I used to rent a family home (by the week) at the beach to help cover the costs. The upside – some $. I was not there to oversee it, so here is the litany of downsides:
Getting that phone call on a Sunday morning that there’s no hot water/toilet is clogged/you name it and having to find someone to repair on a weekend. (I still have a home in that town and the last time we had no hot water, we were told it would be 3 days for an emergency call. Service is hard in many vacation areas!)
Having a guest show up and decide they didn’t like it and leave, demanding a full refund from managing agent, leaving house empty for a week.
Managing the cleaning service.
Things getting broken/lost, etc. If you need to leave beach chairs, boogie boards, etc for guests, don’t count on them being there all season.
Too many guests for septic.
Having to lock up your own things in a closet (which the occasional guest may feel obligated to try to get into.) This, as well as things not finding their way back to where they belonged, can make the place feel a bit less than fully yours.
Not being able to be spontaneous about using your vacation home because it’s already committed to a renter.
Having said this, we had a few regulars who, over the years, took their same 3 weeks every year, sent us hand-made notecards with pen and ink drawings of the trees around the house, bought fun coffee mugs that matched the decor, and who ultimately ended up feeling like family as,we all shared a love for the spot. Not every guest was a problem and some were a joy.
If you are going to do this, as with any second home, be prepared to spend part of your time there doing maintenance. With renters, you will never want a fridge to die, etc., so you may need to do maintenance and repairs more aggressively than you would for yourself. If the place is big, you may need to do what a friend did and get 2 washers and 2 dryers so the cleaning company could turn it around quickly. You’ll need to be more careful about safety (no older places with possible lead paint, careful pest control, extra safe steps, etc) and pay more for insurance.
Know rules about evicting non-paying renters (especially if you are doing longer term rentals) and know local regulations about short-term rentals, including those around collection of “hotel taxes”.
Personally, I have seen this work best for local owners who can respond quickly to issues. It’s much harder if you are further away. No doubt, that’s why a service like Vacasa came to be. But for all the grumbling, it can be a good way to mitigate the cost of a second home, and in most cases, you can stop renting if it’s not working for you.