I get it if you want to take sub to just long enough to clean it refurb and sell but as a long term investment strategy its STINKS.

It depends a lot on your risk profile and regular income.

Some landlords report that it regularly takes around six months to start receiving direct deposits from the government.

But using that mindset, so is landscaping, plumbing, or clean out during turnover.

It's a nice feeling not to have to wake up to go to a "regular" job!

I also find that depending on the tenant, my one Airbnb property has less wear and tear because it's constantly cleaned and maintained versus my other rentals where the families living there settle in and accumulate stuff - which makes it hard to deep clean regularly (to my liking) as well as just the constant daily wear and tear from kids etc. 

That strategy is not going to work at all. 99 percent of agents don't even know or understand seller financing and will just think it's a scam (which it is most times these calls come in since the caller has no money and therefore is irrelevant to a regular homeowner).

I've allowed pets in my STR for five years and haven't had any problems except some extra cleaning a couple times, which was paid for by the guest. 

Oh look, you get to deduct your cell phone, your internet, your tax prep, all kinds of other things regular people don’t. 

If you have a stable asset, predictable returns, and a lease structure that’s well-known and well-documented, a regular market valuation might make sense.