If he can't/won't control his kids or whoever is causing the toilet stoppage, then he will learn after a few $ repair bills

in particular make sure you know the value that will be added by the ADU and that in your case both units may be rent controlled (no 15 year exemption in some jurisdictions for a garage conversion were garage is over 15 years old.  

PAL - passive activity losses limitationsHere's the compromise our tax system created.

It can boil down to human error and things we can control, but sometimes it is just an issue out of everyone's control. 

At least, find out who the company is and have them send over the bids to you so the company can't mark up.I also want control of the bank account, in my name.Gino

Generally the big boys are running big firms and big systems. 

However, not everyone has the income to qualify conventional, so the alternative route would be DSCR loan where the program doesn't look into your income, instead it evaluates based on the subject property rental performance based on the ratio system.

This strategy can help reduce utility expenses.Mid-term and short-term rentals can have utility costs up to 10% of gross income, including electricity, water, gas, cable, lawn care, and pest control.

I agree with the need of a furnace.Most mountain cabins have hot tubs.Emergency generators aren't cheap, but great to have during a sustained power outage.I've thought a battery backup system might be a good compromise.

This implies residential units can be built at lower costs and provide better return. 11) adding an ADU to SFH can make the SFH fall under rent control.