I would talk to a lender about the 3.5% FHA rules and regulations as far as the self-sufficency test goes. 

I self represented on my personal purchases while I was a W2 employee - worked out great :) 

In my own personal experience, self-managing an STR can be quite a hassle at times, and not so bad at other times. 2 years ago my answer would have been that the juice is absolutely worth the squeeze for me.

Doing so could be considered a form of illegal eviction or "self-help eviction," which is prohibited by law.

I'm trying to migrate from Evolve, and I'm wondering how those of you who self-manage remotely handle emergency issues. 

to buy land and develop RV Park for long-term guests and/or self storage...

As you may know being local, SB249 is the bill that came up as a defense against towns like North Conway trying to shut down STRs, but it ended up in zombie state due to the sheer nature of diametrically opposed views on the matter and Governor Sununu’s push to do better than what the bill ended up proposing.Some details here: https://legiscan.com/NH/bill/SB249/2022As with all areas in New England I encourage investors to start thinking of oversaturated STRs markets as expense offset versus cash flow properties.

If you wish to buy rentals using your retirement funds you simply need a self-directed IRA (or Checkbook IRA if you wish to have more control). 

Occasionally there are some that don't ask 1000 questions and are pretty self sufficient, just trying to maximize their time and network, so those may get some consideration. 

I prefer local investments as it allows me to self-manage and avoid management fees.