Someone please school me on this - what can i expect to earn?

[Jason Schmidt]

$75,000 house with 6.5% interest, 5% down. Assuming I can get $750 a month rent, what can I expect to:

1) receive in profit each month?
2) receive in profit each month after it is paid off?

I would have a property management company do the maintenence and such, and would be doing an insurance thing in case the a/c or something goes out so I wouldn't have to deal with it.

Further, are there any costs associated with buying a rental that wouldn't go toward the price of the house? IE closing costs and such ... would i be paying hundreds of dollars just to buy the dang thing?