Put it in writing and make them sign it.

I did not sign anything after the original deal.

And correctly..you cannot co sign as a primary if it's occupied..2+ units can sometimes require larger down payment (as you've found) another option could be to access equity against another property..check in with @Joseph Chiofalo for potential lower down payment options..might be able to get to 15% down..Good luck! 

The rent usually increases, but I give a discount for signing a new lease.

I had signed up for a 3rd investment at a very early stage for another 400K thru a 1031 exchange.

It’s important to get a structuring attorney involved, particularly in a state like California, before you sign a Purchase & Sale Agreement.

Regular inspections for any signs of wear, cracks, or water damage are advisable to maintain the facade's integrity.Parking and Access: The covered parking area is a significant advantage for tenants, but ensures the area is well-lit and secure to prevent any potential safety issues.Interior Features:Layout: The open floor plan with large windows ensures ample natural light, which is appealing to tenants.

Context: My dad has assorted health issues that limit his physical abilities and does not want to fill out forms or devote much time beyond discussing things with a Lead, reading over anything he’s signing, and sending a check.

I would assign parking spots respectively before leases are signed. 

I have about decided to require a “Morals and Ethics” quiz before signing on a homeowner.