Seller Finance terms

[Sabrina Sorensen]

We are new to bigger pockets and have the opportunity to purchase a four-plex using seller finance. Home is in good condtion with newer systems and rents within hours. Terms: Purchase Price: $420,000, 6% interest rate, 10% down, 10 year balloon with 30 year amortization. With those numbers, we wouldn't be making much passive income each month when taking into consideration, vacancies, maintenance, etc. Rent is increasing in our area so we can adjust for that each year and make more profit. 

So my question are what are favorable terms for the buyer on a seller finance? How much passive income is considered a good amount on rentals? Do we look at this as more of a long term asset that will cash flow more at the 10 year mark or a short term one where we can get some passive income each month? Any help would be great! Lots to learn!