I think 7-10yr balloon would better suit a note buyer if you go that route.

What are the pros and cons of going this route? 

The valuation and market value of a multi family property differs from a single family and you want someone that understands the distinctions if you go that route.

This isn't 2011-2013 days but many people are stuck in that time period STILL.As I finish my licensing study, I'm very grateful I chose this route as opposed to being a one trick pony.Wholesalers did themselves in by their method of operating.  

Just make sure you’re comfortable with the interest rate if going either route.  

If this were my property, I’d run a detailed rental analysis (from what I’ve read in Forbes) to see if the short term route could outpace traditional leasing.

If seller financing is the route you go, you might consider getting creative with the structure to make it work for both parties.

The cleanest route but the least attractive method for most investors is to have the investor provide debt.

The general advice I'm hearing is that if I want what I'm looking for, then avoiding a C property is the route.

I download those into Geo Batchcode so I can plan an efficient route to check out those properties, and of course I take note of any others of interest that I see along the way.