We have financed these through various methods including traditional, home equity from our primary home, private money, and seller financed. 

Which maybe this is the strategy I need to think about as well as potentially being a private money lender.

You wouldn't have to do any work to it as your rent to own buyer would be responsible for maintenance and upkeep of the property over the course of his lease.Hope that helps,Chris Preps if any of that resonated with you shoot me a private message and I can give you a few things to check out for free

Purchase price: $30,000 Cash invested: $35,000 Sale price: $77,000 Purchased this SFH with a private loan and sold on seller finance.

Rehab loan along with private investor How did you add value to the deal?

There are always bad apples in every sector. 

Since then, I attempted a short trial of AirBNB, but when the bookings dropped, I switched to House-Hacking with short-term monthly renters for each private room. 

Separate studio or one BR unit with separate entrance,  aka "Granny Suite" for multiple purposes including a place to keep for yourself private when renting the rent of the house.

I've had several private conversations resulting from this post.

At the end of the day if you can't go any of those traditional routes then it would leave you with private lending....like when your parents lent you money.