A homeless Detroit man bought an abandoned house for $1,500 and spent 10 years renovating it for his wife. Here's how he did it - and what it looks like now.

Michael Gray's house is located in Detroit, Michigan right outside of the University District. It's around one mile from the University of Detroit.

Detroit was once home to the booming auto industry. In the 1950s, the auto industry started declining and companies started moving out of the city. By the 1960s, people were leaving Detroit in droves.

In 2013, the city filed for Chapter 9 bankruptcy protection. Now, more than five years later, more and more people are investing in the city.

Just consider entrepreneur Dan Gilbert, the billionaire founder of Quicken Loans. As Business Insider previously reported, after Gilbert moved his company to downtown Detroit in 2010, he started the real-estate firm Bedrock. Not only is Quicken Loans now one of Detroit's largest employers and taxpayers, but as of 2018, Bedrock had invested or allocated $5.6 billion in roughly 100 properties in downtown Detroit and nearby neighborhoods.

Gray documented the entire renovation process in two large photo albums, which he mailed to Business Insider.

He bought the house in 2009 for $1,500 from his nephew, Sylvester, who is a broker for Global Property Investment Group, a commercial real-estate agency.

Sylvester told Business Insider that his office buys real estate, sells real estate, renovates properties, and rents properties.

Global Property Investment Group acquires properties from a variety of different sources including asset managers, the Detroit Land Bank Authority, and the Wayne County Tax Auction, according to Sylvester. When properties don't fit into the company's business model, they are sold to independent purchasers, which is how Gray came across the house.

Gray told Business Insider that he's been living in the house since the day he bought it and that he started renovating it in April 2010.

"In Detroit, if you're not there or you don't have someone there, someone will come in and take your stuff. It's gone in a matter of 15 minutes, gone," he explained to Business Insider.

When he first moved in, the house was infested with mites, spiders, and mice.

He wasn't even able to use the toilet. "The plumbing wasn't working. We were not able to use the toilet at all," he told Business Insider.

He slept on an air mattress upstairs and started renovating the house room by room.

Prior to buying the house, Gray told Business Insider that he was homeless.

"I had been going through a rough time in my life," he explained. "I was staying with my niece and sleeping in her basement."

Even with a college degree, Gray told Business Insider that he wasn't able to find a job in Detroit.

Gray graduated from Spring Arbor University in 1986. He double-majored in English and psychology. While he was living in his niece's basement, he told Business Insider that he worked as a day laborer.

"I also began to crafting my rehab skills working as a laborer for guys who were fixing up homes to rent," he told Business Insider.

But in 2008, his life changed. While riding his bike, he was hit by a car. Using money from the settlement he received from the accident, Gray was able to purchase the house.

His wife, Cynthia, who at the time was his fiancé, was there through it all. "My wife had been with me through thick and thin and I told her that I was going to give her a house that she would be really proud to keep, live in, and show off," he said.

When describing the renovation project, Gray called it a complete rehab. "I tore everything out, all the way down to the studs," he explained.

Gray said he did around 80% of the labor himself, including the flooring and the painting. His vision was to "make it a family home forever."

He learned how to do most of the work during his time as an administrative assistant for a construction management company in Michigan.

"I was on a project in Monroe, Michigan," he explained to Business Insider. "When I was part of that renovation team, I watched the guys, I asked questions, and I said 'I can do this.'"

And, for the work he couldn't do himself, his friends, who were qualified to do the work, lent a helping hand.

They helped him install, along with other things, the drywall, the electrical box, a new furnace, a hot water tank, and central air.

Gray told Business Insider that the hardest part of the renovation process was fixing the broken beams in the ceilings.

On the flip side, he said the easiest part was the tiling. "It was hard work, but I enjoyed doing the tiling because if you put a lot of love into what you do, your floors reflect a lot of who you are," he said.

The major parts of the renovation process were completed in July of 2012. However, Gray told Business Insider that he is constantly improving the home; at the moment, he's working on upgrading the basement. He plans on finishing it by next year.

When he neared the completion of each room, Gray would stain, sand, and polish everything. "She [Cynthia] had picked out the paint she wanted for each room and, after the drywall went up, I put the primer on and painted. I was closing out the rooms as we completed them," he explained to Business Insider.

Cynthia was in charge of decorating.

"That was for her. She shopped 'til she couldn't walk anymore," he told Business Insider.

The now home has three bedrooms and one bathroom.

There could be four bedrooms, but they decided to convert one of the rooms into a walk-in closet.

Here's a close-up of the newly renovated crawl space. So far, Gray told Business Insider that he has invested around $70,000 into the home.

Gray currently works as a machinist in Bowling Green, Ohio. During the week, he lives there in an apartment. He joins his wife Cynthia at their home in Detroit on the weekends.

On November 2, they celebrated their 10th wedding anniversary.