You will find a lot of false information on the Internet because a lot of companies that do drywall remediation you scare tactics so they can charge very high prices.  

(Catering, lunch rooms, WiFi, etc.)How do you charge for space, availability and usage?

Tell them "My business is based on referrals and my goal is to provide you with 10+ service so that when you close on your home you feel confident and excited to refer me to your closest family and friends"2) Then: when the transaction is at it's most emotionally charged (positive) state, say they just won out on a multiple offer, ask them for a referral.

The market determines how much they can or can't charge.  

An FHA loan is different with MIP and the premium is charged to the life of the loan, I'm not sure off the top of my head if that is short rated or not in a total refi payoff.

Charge him for the dead trees?

I've noticed that some charge a flat rate vs taking a percentage of the total rental income.  

@Rob Smith - all great points above.One thing that I didn't see mentioned is becoming a private lender for real estate investors.IMHO - this is the fastest way to grow you limited seed funds.You can easily charge 1-5 points PLUS 12-15% APR for short term loans that are secured by real estate.I personally use a handful of private lenders to fund my wholesale business [I don't do assignments, I close on each property before reselling].I never pay more than 65% LTV and give the lender a Promissory Note along with a Mortgage.  

I was shocked to find out that I was charged a $35 wire transfer fee for the rents received.

Try to pay any charge offs you may owe if you can afford to.