Owner gets interest payment proceeds from the buyer.* We have heard that this is a way for the owner to avoid "Capital gains"? 

Here is one of our questions can we use the property in question as part of our down payment since we have it under a master lease.

I will be able to cash out my original down payment + 30k more if I wanted to but as im going through the process I was wondering in the future if I pursue investing full time how do you still get approved for mortgages?

This will help get you a lower payment for the first 2-3 years of ownership and allow you to refiance when rates come back down.Show as urlRemove3-2-1 Buydown Mortgage: Meaning, Pros and Cons, FAQsA 3-2-1 buydown mortgage offers borrowers a three-year break from high interest rates.

I was planning on funding the 25% down payment on the single-family rental purchase with a HELOC from my primary residence.

The more "things" you add the more attention your listing will get but you need a cut-off.

I was paying $200 mo in rent and the new loan payment was  $900+.

You'll pay top of the market price and with the current mortgage rates, it's unlikely your payment will be covered by rent.

It usually is less than 200 per year in payments 6 months apart of less than $100. 

If you have the income and credit, maybe you can sign on for the loan and someone else provides the down payment?