That leaves them with all the power to deny any loan you get, regardless of what it would cost you to repair it.

With the Yale lock, I can see who goes in and out of the house and when our tenants leave, we can always change the codes from a far.

Yes, you can go visit Class C & D tenants at their homes to convince them to sign up for auto-pay, but:1) Once you leave they will revert2) Their biggest problem is NSFs! 

With rent control in NJ, yeah, it’s mostly a waiting game if tenants don’t leave.

Those are always good because your unit can get on the market again faster and the tenant usually leaves in an orderly fashion.NJ is an attorney state.

I've seen buyers leave $500k on the table and tell their friends they got a good deal by not having an agent involved. 

The house is a new construction in a Class C neighborhood.The tenants pay late rate ~50% of time, they damaged part of the garage, they have people not of the lease living there, and they leave trash in the yard.Part of me wants to keep these tenants because:-They do pay eventually-I don't want vacancy-The turnover costs could/will be high-How much more damage could they do?

If they understand they need to leave and discuss honestly what they can do to make that happen then you are both working to the same end.

Or, you could move out and leave this first purchase as a rental and buy another.

I'm currently with an investment brokerage but my end goal is to be an investor and feel the big shoes my parents are leaving me with!