Remove all bedroom doors, except the room your mother will use for a bedroom. 

you won't be able to pull a permit. when someone lives in it and it doesn't have HVAC, plumbing, or electrical right and it burns down like another garage I tore down and someone lost their life in linden you'll get hit with a lawsuit. good luck. you'll also be the first person I've ever seen to get a second adu built in linden.

Closing in garage to make a full laundry room and a 3 rd bedroom.

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases.

Complete remodel, redid or replaced all flooring, plumbing, electrical, new roof on the garage and retied all the windows.

If you don't have a pipeline of potential renters banging on your door...

I am exploring the idea of removing the stairs in the main house to the 2 floor and stairs to the basement to convert the 2nd story to a separate unit(add stairs outside) and convert the basement(cut egress door). 

Example in Oregon is a 5Plex asking $550K+/- or $100k/door. $125-135k down.

They'll swab different parts of the inside and outside, especially doors and wood windows.

If he does not do the work he is supposed to do or do it in the timeframe that was initially anticipated, what happens?