Explore my personal favorites, Set For Life by Scott Trench or The Total Money Makeover by Dave Ramsey, for invaluable financial insights.3.

I personally would sell it.Your return from real estate is two items - Cash Flow + Appreciation.What is the annual rate of appreciation you are getting, approximately?

A new person moves in and she says the upstairs neighbors are creating a ton of noise.

Also, personalized post card size info/thank you card with the top 5 restaurant/bars or attractions in the area.

The question is, what is the intention  of the owner, not what would a reasonable person think is the intention of the owner.

Yes, in theory a person can make CRAZY $$$$, and some absolutely do. 

i think this is a decision only you can make. im in a similar boat (house hacking my primary) and considering renting the whole thing out to get a solo home for myself. certainly a lot of appeal in that, given how much work goes into the house hack. but whether or not the numbers on cash flow align is up to you. personally i dont think $150 (seems like about 12%?)

Personally, I would pay off the higher rate first. 

If the person stops making payments, they alas,  have to foreclose.

It’s a business account and I just checked, paying 3.95%, more than my personal one!