If the expenses, including rent from the half that you aren't living in, are less than you are currently paying for rent, you will be further ahead. 

Cost only $150 and takes roughly an hour to do not to mention it's an 1/8th inch thick and will last much longer then re-glazing (10-20 years as oppose to re-glazing that is very hazardous and last only 1-4 years).  

So if they default at any time, when you can go into eviction court it will be on those full amounts not half measures. 

New floors, completely repainted, new appliances, half bath added, and electrical updated.

If he balks at the costs, go over the fact he can still save the listing half plus any marketing costs of selling, and would help you afford the final purchase (and rehab if it needs work.) 

I try to look for a company that is the least restrictive and “keep my eyes half closed” on rate.

Full bathroom is always better than half in my personal opinion

If you also have an unallowed loss from these activities from an earlier year when you didn’t qualify, see Treatment of former passive activities under Passive Activities, earlier.Qualifications.You qualified as a real estate professional for the year if you met both of the following requirements.More than half of the personal services you performed in all trades or businesses during the tax year were performed in real property trades or businesses in which you materially participated.You performed more than 750 hours of services during the tax year in real property trades or businesses in which you materially participated.Don’t count personal services you performed as an employee in real property trades or businesses unless you were a 5% owner of your employer.

So, I got to keep 5 months worth of rent, which is another 5k, and pay my lender back in ~half the time it was due. 

Doesn't mean I enjoy spending half a day doing it when I could be working.