Quick question on those who have done seller financing:- Buying a 0.3 acre downtown fort lauderdale multi family, negotiated an around 1M price w lot of development rights, double lot. seller got it way back early 90s for pennies- got good credit 800+, w2 job etc put 40% down and mortgage bank offered 6.62% 30yr fixed (CF negative as this would make current rent roll not too much compared to the PITI)- property is in ok condition, needs 20-30k repairs which seller OKd, and all 3 tenants are month to month, pay bit under market but also ok- seller would like to do seller financing, interest only at 5.75%, 30yr amortization at 7yr balloon (CF would be positive) - id be paying some principal as well, just to grow some equity- buying this deal for the future development of the area (las olas, kushner broward crossing) so not really worried even if we overpay for it now, but never done creative finance as i always relied on a strong W2 job to get good loans but obv im used to 3% 30yr rates from covid times not this 6+ environment..Goal is to hold the property 3-5yrs, and then actually develop it or sell half the land / refinance, pull out HELOC if it appreciates.Questions:1) What does he know that i dont? 

Though it may cash flow well based on their current debt service, when you compare the income it produces to the equity they have is it actually even a good investment for them from an ROI perspective or would they be better off liquidating and redeploying?

Two identical homes located next to each other would come up with the same value, even though House #1 was just renovated to a very high standard and House #2 hadn't ever been renovated since it was built in 1949.I always tried for an identical (or nearly so) beds, baths, sq ft of living area, garage and acres. 

Obviously rates may differ than the rate sheet being advertised but just looking it appears the home equity and home equity loans are going to be more than a second mortgage or even a cash out refinance.

That makes me even more suspect but that is just me.

Even after renting, you should check the market every month or so to keep an eye on prices, vacancy rates, etc.

I would say that is about right.And in the end, as @Arn Cenedella wrote, it is as much art as science...so even the best killer spreadsheet only takes you so far. 

It's even better if you've done it with land that was purchased at an auction!

It could also hugely exceed anything even remotely reasonable for some of the properties at the other extreme.

Even if you want to roll the dice, at least is a calculated risk, not a surprise down the road.