Hi Matthew,
Making use of seller (owner) finance can be a fantastic way to acquire real estate!
Following the 2008 "Great Recession" my credit score was in the tank. Thus, couldn't borrow conventional financing.
There were 2 ways I acquired real estate anyway: 1) Cash; and 2) Seller finance
The first duplex I purchased was in Midtown Sacramento. It was run-down with 1/1's on each side and needed fairly significant renovation. However, it was in an excellent location.
The ask was $350,000.
I offered $100k cash down and asked the seller (owner) to carry the balance the balance of $250k for 3 years at 6% interest only with monthly payments of $1,249.50.
There were 3 other offers. One was all cash. Was discouraged upon hearing of the cash offer "competition", because I believed the seller would take that offer. Instead he took mine! He owned the property free and clear and was able to carry that new first note and mortgage from me secured by the property.
Put $100k into renovations, which put me at $450k in. The property rented immediately and never had any vacancy. Prior to Calif state-wide rent control we enjoyed rent increases based on market demand. Sold the property for $650K (1031 exchange to another property).
But, it doesn't end there! Asked my seller if we could still work together and if he would continue lending me the $250k. He said the only problem was when we sell the duplex he was going to have capital gains taxes and couldn't loan as much.
So, we went to our CPA's who gave their blessing to moving the note to the property I next acquired (lawyers call this hypothecation). And, in fact, we just did it again when we did a cash-out refi on that second property and used his note (once again) to acquire yet another income property.
This is (and was) one of the best experiences I've had with real estate.
Was also able to purchase a small 2/2 bunaglow from a lady in Midtown Sacto who owned it free and clear and she had other properties. Gave her $100k down and she carried $325k balance ($425k purchase price). When the home appreciated and though (very aggressive) principal pay-down (her note was fully amortized over 5 years both principal and interest), we did a cash out refi (she got paid off on that seller carry back) and we used the cash out as the down payment to acquire another duplex by combining with a new first mortgage from the same lender.
So, yes, by all means, if the terms are right - I'd say go for it!
Cheers!
PS - To answer your other question, we didn't inherit any tenants on that first deal. It needed renovations before we could lease it up. Buying multi-family with existing tenants can be a good play, especially if rents are below market - you can make some nice renovations to justify rent increases - and your not in a rent control jurisdiction. You can make equity almost immediately by doing this. In one instance on one of the Sacto duplexes (again pre-rent control) we improved the property with about $10k and upped rents from $850 to market rate of $1,350. One was a new tenant we placed and the other agreed to stay at the new rate. The building went from $425k purchase price value to $550,000 within a few short months.