It may sound nice to pay a 5% management fee but the extra fees can add up to be more than the other company that charges 10% with no add-on fees.

How would you go about charging tenets their portion?

We want to pay our property manager with a credit card but PayPal and other online websites charge 3% fees for credit card transactions.

When I send them their check-in details I remind them that for every 15 minutes they check-out late, they will be charged $X per 1/4 hours. 

In my humble opinion, you will have to charge much less and it won't be easy to have significant occupancy.If you want to invest there, it's a good idea to get educated about the market.

These are structured differently with us either getting points upfront and a continuing service fee and/or part of the note discount on note purchase.On real property syndication we make money by charging 4-6 points brokerage fee (I hold licenses in 4 states), asset manager fee, and 20% of capital gains after investor preferred return of 8% annually.  

A brokerage will also charge you points in addition to the 2% you pay to a buyers agent.$200,000 - $10,000 (closing costs and repairs) - $4,000 (buyers agent at 2%) - $4,000 (brokerage at 2%) = $32,000 (minus property taxes, transfer fee, etc)

The cost of being a realtor is not only the class, it's the test and license, joining a brokerage (they charge), joining the board of Realtors, and gaining access to the MLS. 

Any idea on cost comparison or up charge for the service?

I charge for them, because so many of the deals don't pan out.I charge my time plus scope of work, usually works out to be about $275-$500 depending on size of property and how large it is.