As with any side gig that brings in extra income, you can bet the IRS will mind if you fail to mention your new role as small-time innkeeper.
Here's how H&R Block's Jenna Bromberg lays it out:
If you want to skirt around taxes:
"Rental income is usually
If you're not renting out your prime residence:
"In addition to renting the home 14 or fewer days during the year, you must use the home for personal purposes more than the greater of 14 days or 10% of the total days it is rented to others at a fair rental price. This is no problem if you are temporarily renting out one spare room in a home that you live in. But for second homes or vacation homes, you need to keep track of your days."
For an exhaustive guide to tax codes surrounding rentals, see this IRS page on residential rental and vacation property.