Multi-unit house. Can you look at my numbers?

[Matt Hegedus]

I'm negotiating with a seller here in PA and I'm wondering if this makes sense to the guys with a little more experience in multi-units.

4 units in 2 separate houses on the same block.

Asking price: 90,000
Gross Income (all 4 are rented): 21,600

That's 1800/month gross
Expenses per month: 1000 (about 55%) is what I'm figuring after vacancy, even though his numbers are lower.

First loan: 80,000 @ 6.5%
Payment: around 500 /month

Second loan from seller: 10,000 @ 6%
Payment around 100/month.

NOI: 9,720
Debt service: 7,200

Cash flow: about $200/month.


Considering I get the loans, does this make sense to you guys? 
The tenants pay all utilities except trash, and taxes are pretty low for this area.
Won't need roofs for 5 years. minimum. And my numbers above are fairly conservative.

What are some things I should look out for?
I know snow removal and landscaping are taken care of by one of the tenants.

Should I look for lower interest rates? (I figured 6.5% because my credit is under 600 at the moment).

What are some other options for getting this funded? Would you do the deal?

Do you have any other questions for me? This is my first rental... Thanks