Keep in mind that legitimate players here will usually finance you out of the deal as soon as they are able unless your terms are better than what they can get from trad financing. 

Please keep us in the loop for things like this so we can assist.

If not, pay off the mortgage all at once.This will help keep you from rationalizing a bad rental purchase just because you earmarked the funds for it. 

Keep us updated on your progress!

Are they still buying properties themselves, it keeps them aware of the market and changes 2.

There's also the fact that you'll stop growing equity there, when you could instead access most of the equity and keep growing wealth through the home.

Its the "blocking and tackling" and going with the basics that keep you out of 90% of the problems that we see people have.

Keep talking to people and doing your homework (and asking questions like you are now!) 

Pairing hard money loans for acquisition/rehab with DSCR loans for refinance seems like a strong approach to keep the momentum going.Do you typically fund multifamily properties in New Jersey?

Keep looking, and let me know if I can help :)