@Dulce Beltran
Debt assumption is more common in commercial properties (5 or more units) but can still be done in residential. Was pretty universal in foreclosures, or when working creative deals.
Not so common anymore, here's a link on the reason why: https://www.johntreed.com/blogs/john-t-reed-s-real...
How does that benefit the owner? People sell for all kinds of reasons, and the cost savings for the seller of an off market property can be substantial, and much faster. I like to remind myself it can be a good deal BOTH ways in the transaction if done well. Just need to break down what the seller is really after versus what they're telling you (usually not the same).
Commercial funding? Far more open to creative solutions. There's different regulations at work in a commercial purchase which are less restrictive. So you can see lots of seller carryback financing, also defeasance work arounds, or even sometimes multi stage buy outs, even simple lease options, and of course traditional funding. It depends on how comfortable your sellers are with these concepts, and which piece fits the puzzle.
That's one of the reasons I enjoy commercial property so much more than residential. More flexibility.