The difference is the bank underwrites your file up front and offers an ELA or "Express Loan Approval" which is a guarantee to close in 15 days or less.

However, the seller's agent expressed 'All tenants want to stay'.   

No amount of YT or self-work books can get anyone to our level.

Upon move out and receiving a portion of the security deposit, we were charged an over $400 cleaning fee in addition to some normal wear and tear items because they exceeded the apartments self calculated normal wear and tear allowance.

Self storage and country subdivisions.  

I would use them myself but I self manage my own properties..

All the more reason to hire a good property manager, or if one insists on self-management, make sure you get to the property at least once a year.

Townhome/condo/SFR - rent by the roomADU / multifamily units - self explanatory Storage / Space rental - Rent extra space/bedrooms/garage for storage, driveway for car parking, etc.

In fact, there're several "layers" of restrictions, including "at-risk" rules, basis rules for pass-through entities, hobby rules, new (as of 2021) "excess business loss" rules, special rules for Section 179 and business interest, self-rental rules, vacation homes rules, and more. 

We can use alternative documentation if self-employed such as 12-months business or personal bank statements.