I think the NJ Tenants Rights Handbook states that Tenants can change the locks and are not required to give the landlord a key.I provide the handbook to my tenants, but ask that they do not change the locks as I need to get in for HVAC maintenance, repairs and emergencies. 

Starting and pulling the trigger on something is the most important thing.

yep lock it up and figure it all out during the inspection period

I use 3 simple steps blended with different psychological triggers.

Electronic or manual locks?

I just locked down a 64 unit in Stockton TX.

I am from Wisconsin, and hoping to lock up a fix and hold property in Mesa, AZ.  

1 Year construction loan locked in at a 5.5% interest.

Help her to change the locks once he agrees to move out, but you can't really force him.  

One time expenses would include things like furniture, pots & pans, silverware, coffeemaker, blinds, bedding, TV, internet modem, electronic door locks, vaccuum, other cleaning tools, accents & pictures.