I've worked out the numbers a few different ways, and even with the worst-case scenario, adding the third unit to this property will enable pretty healthy cash flow, though it would be pretty iffy without it.

Coming from someone who made the mistake of looking for a lender 1st.

I put about 70% of the money I make from work into a savings account invested in the VOO S&P 500 Mutual Fund.I am hoping to find advice that will help me skip past mistakes made by more experienced investors when they were first starting out.

Is he the type that will hold any mistakes over your head indefinitely?  

I wouldn't immediately assume the worst, but would want to reach out to find out what was going on.

When I bought the house I made the rookie mistake of taking on her utilities bill without knowing it.

I spoke to the county clerk and was told these belong to a person with my same name and it appears to be a mistake.

I bought my first house hack this past March and am happy to answer any questions and help you avoid some of the mistakes I made. 

Right off the bat this person did not have their GC license and looking back at it this was the beginning of my newbie mistakes.

I made a mistake this year and did peel and stick because I was in a hurry and cheap.