I need help analyzing 4 plex Opportunity

[Patrick Rowe]

I have opportunity to purchase a 4 plex for $77,000. I looked at the 4 plex on monday and I estimate the repair cost to be around $12000 to $13000 per unit. The 4 plex is in a c may d area but not a warzone. I did some research and found out the units are renting for $600 per unit. I spoke with my banker he is willing to lend money on the purchase and rehab. I will have to put down 10% of the purchase price. The banker will lend 85% to 90% of the appraised value. I looked for arv in the area but the more recent ones are foreclosure. They do have one 4 plex in the same area that is identical for sale for $170,000. The square footage on the building is 4850 3- 3br 2ba 1- 2br 2 ba. The units are all vacant. My goal is to create a real good cash flow portfolio.