Help with analyzing numbers

[Joel NA]

This forum has changed the way I view money, not just RE. Thanks to all.

I would like to put in an offer on a brick duplex in my neighborhood. It's in great shape...I'm my own property manager and maintance guy but I've got a network of subs in case. Still trying to acquire my first property.

At my offering price, the 50% rule would be satisfied. However, when using the Property Analysis tool from BP, I get only $75 per door Here are my numbers...

70K price, $9,800 down payment at 7%/ 30 yr. mortgage

Rents at $900, $450 for each 2/1 unit

advertising $5/month
cleaning $3/ month
ins. $50/month
maint. $25/month
Landscaping $5/ month
PMI $30/ month
Taxes $91/month
Trash $10/month
utilities (propane) $75/month

Any thoughts, general or specific, would be appreciated. Thanks!