I am looking at an off market deal to help a neighbor and make a long term investment.

If you don't have a tax professional already that you can trust and rely on to dive into the weeds on this stuff with, that is most critical to your long-term success in using the tax code to your advantage. 

Those terms would make more sense on fix and flip or BRRRR.

It’s a short term juicing that can be helpful to stave off an economic slowdown but is not and should not be used long term.

Yes, I've seen it change in the last couple of years, I had a lender that is a veteran credit union that used to offer them and they stopped.I am W2 employed and have a company on the side for real estate mainly short term rental.

The Earnest Money shall be refundable under the terms to be specified in the PSA.Due Diligence PeriodThe Buyer shall be afforded a due diligence period of [Number] days commencing upon the full execution of the PSA (the "Due Diligence Period").

@Emma Hustiswell, they're separate - you'd negotiate the price and terms with the seller, and now that's your mortgage payment (principal and interest, or P&I)then, you plug that mortgage payment in, as an expenseso, use a mortgage calculator first to generate the monthly payment, based on the seller financing termshope this helps

Can the lender "blast" you for following the terms of your agreement?

I keep wondering about insurance, vacancy rates, if tenant selection is a bigger/ different factor, terms of the tenancy and differences in opex and capex?

My options are:Sell: Maximize down payment in NC, reduce debt.HELOC+Rent: Keep NJ property as an investment, rent for potential $3,300/month.I'm interested in long-term wealth building.