He said a realtor has advised him to sell it for $500k so he wants exactly that as well as $80k down at a 6% interest rate.

Then when I sold in 2022, it was before rates really took a jump. 

There may be other options at lower rates this year if it helps at all! 

But multi families should be valued by being pegged to a cap rate for an area or the country etc that investors expect. 

Depending on what their FMR rate for your area is v. what you'd like to raise her rent to, that could be significant.

If you buy Core right now you might a get a yield similar to the interest rate you would pay on a heloc.

It’s likely those high price points are going to remain that way and continue to appreciate better than other markets along with NH having one of the lowest vacancies rates in the entire country if not the lowest.

When talking terms, be ready to discuss interest rates and the loan-to-value ratio, making sure the deal works well for your business goals.

I know this is a real estate forum, but just realize that you'd have missed that AND lost 5% since you have to pay yourself the G fund rate, vs. the G fund paying you.I'm not anti-real estate, but I don't prefer it when people take extra risks with their retirement. 

Here's a bit more in detail about how rates are calculated for DSCR loans:1.