So while I'm not a lawyer, I'm no stranger to contract terms.  

This is a city code issue, and not something strangers on the internet can solve for you. contact code enforcement the next time it happens and let them come over and listen.

The house was a little messy and she would not have wanted strangers parading through the home.

Would you start any other business, and then expect complete strangers to run it for way less than minimum wage?  

Start out like they are strangers. 

It is like having a bunch of strangers having the power to interfere with your investment.And then there are the board members who decide it's their mission in life to harass owners/tenants about every weird thing, like potted plants on the balcony or whatever.I only bought the one condo, intending to keep it forever and rent it out.  

I wouldn't call losing 1/3rd of your living space, having strangers making a lot of noise in your home at random hours, having to take off work to supervise those strangers to make sure they don't steal anything, and having an area unsafe for kids when you have kids an inconvenience.If you aren't providing a habitable unit the tenants are not required to pay rent regardless of if you say so in your lease.

It’s crazy we come to the internet to get verification from strangers we never met.

I have to get a stranger roommate because I lost half my income.  

Get on the phone and talk to strangers.