I self-manage and have a pretty efficient network of Excels to show this data.

Based on rental income would be great since I'm self employed so minimal documentation is best for me. 

Ideally, I'm seeking an investment property that is self-sustaining and generates consistent long-term income.

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...

In order to get started just make sure you have high enough W2 or self employed income that you can qualify for the monthly mortgage plus savings for the down payment and closing cost.

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).