Help Analyzing a 4plex

[Devin Scott]

I am looking to buy this 4 plex. Am i missing anything with my numbers? How does everyone feel about the offer price? There are no comps in the area for a 4plex. 

Asking price: $159,900

Offer price:$130,000 w/ seller holding note for 20%

Gross Rent: $2200

Cap X: 220

Maintenance: 220

Vacancy: 220

PM: 220

Tax and Ins: 150

Debt Service: about $700/mo based on 5% interest on $130,000

My intent would be to offer $130,000 and have seller hold a loan for 20% of that. I would get 80% loan(from someplace yet to be determined.)

Cashflow: $470

The 4 units are rented. I have no due diligence yet on any rehab costs. I know that it is at least rentable since all 4 units are rented. The outside seems fine, with no noticable repairs.  

Any advice is appreciated.