They expect you to live in one unit, BUT I have never heard of anyone from the lender go and  check in on you to see if you are actually living there. 

Hi Lauren, welcome to BP!

Read the NC general statute on wholesaling and ask frequent questions to the real estate commission.

There are no laws restricting mark-to-market rents. 

Would need to know about locations of your buildings and current rents to see if there is anything that can be done now to get numbers a bit better.

Strip the floor to the subfloor and paint over it to stain block then just recarpet or put in vinyl to mitigate future stains. 

Me and my partner moved from Utah to Maryland for school recently and we have a townhouse that we are looking to rent. we are currently remodeling and changing a few things before renting. what are the first steps to change my primary to a rental I lived there for about two years.

Quote from @Ryan Konen: You are correct that comping software like Privy, Propwire, and Propstream primarily rely on public records for their data, such as county assessor records, MLS feeds, and sometimes 3rd party aggregators.

My question is, if I was to proceed with the Subject To deal, will this somehow be discovered?

A lead magnet is a powerful way to capture their attention.Examples of Lead Magnets:“Free Guide: 5 Ways to Sell Your Home Fast Without a Realtor.”