You can hire an electrician to install GFCIs, and charge the tenant if they would like.I would have a plumber address the leaks as soon as possible.

I mean most places charge $200 just to show up then the rate on top.Take the disposal out and just pipe it normal.I remember my landlord replacing mine often in college.  

You must continue to pay the rent on time per lease agreement until the property is rented to a qualified tenant plus you will be charged for any fees associated with leasing, showing the property, etc."

There was a recent post here about a guy complaining about how much his property manager charges to send a letter, $45, 20-some posters chimed in that it was crazy and a rip-off, and then finally one of the most experienced property managers here explained that the price charged really involved personally sending certified mail from the post office, actually scheduling a trip involving the inevitable waiting period for getting it done, tracking the return receipt, logging all the information for use later in court if necessary.

While origination fees are never paid up front, fees for third party charges are almost always paid to get the loan submitted. 

I take points on top as a form of down payment; do you charge a separate fee?

It's such an emotionally charged thing it seems risky to show up alone on their doorstep-

If someone wants to bring in a dog I would charge 100 dollars a month extra.

Ask for service call charges and sample scope of work.

It's hard to find quality ones even at 10% so I'd be cautious of any place that's only charging 8%.All in all it looks like you may be underestimating the expenses.