SFR with ADU is no problem. but if you're considering adding an ADU to a multifamily property, consider the limitations you're creating on your back-end buyer if you decide to sell, or your own financing if you choose to refi. 

The DST I purchased with Allegiancy (Alorica DST in Ft Worth, TX) did not do good due diligence (in my opinion) regarding the structural quality of the buildings they purchased for this DST in 2022.  The DST is losing...

The person has a problem that needs solving.

As a foreign investor, I can get financing up to 80% for the purchase of real estate, so the biggest problem for a more serious project is down payment if you have a solution for down payment, please suggest me. 

If it's the case that you are in an area where this is a consistent problem, it may be better to install a whole house surge protector at the main panel.

The worst part is, during 4+ years of problems, I’ve continuously tried to give them the benefit of the doubt and hoped they would learn from their mistakes.

You are about to take over someone else's problems. 

The problem I was having with Stessa and Rentastic is that it only tracks what’s in the bank account not what I get from the PM, so the numbers are off and I have to go in and correct it all.

From a leaky roof to a backyard jungle, it was a crash course in problem-solving and patience.I bought it for $145,000, powered through the chaos with a hard money loan, and sold it for $180,000.

So all you see is problems.