Airbnb’s in this route are hot with some of them having 6 months of waitlist.Does anyone have any experience in short term rentals in Mexico?

The house will break even or profit about 100/month free and clear with about a 10% cash on cash return projected What I am considering / looking for advice:- can I owner finance a property if I have a mortgage on the unit?

What is the best months to secure a property on the low end?

You will end up losing the deal.You need about six months of networking and active deal flow to create a potential buyer's list and email distribution.However, if the deal is really good (very unlikely in New Jersey), it is true that you can find a buyer.

But this past 12 months, I had 3 incidents at the same house, because it was vacant for many months awaiting repairs and inspections.

Plan is, ill pay Heloc in a year from what I save monthly. 

The investor generally needs 6 months of "reserves" or savings of mortgage, property taxes and insurance (and HOA if applicable).

People have been waiting for interest rates to come down for 18+ months now.The reality is it will likely take longer than you expect to happen.

I think I might go check out some of them in the next few months.

I wasn't able to fully repay my HELOC with refi proceeds but I was throwing the monthly cash flow at it as well.