Schake-
Some suggestions. Not a comprehensive list. Be prepared to sell some of the equipment if it does not match your coach well.
1) Brake system
Drop-in options:
Blue OX Patriot
Mechanically-activated options:
NSA Ready Brute or Ready-Brute Elite
Electrically-actuated options:
Demco/SMI Stay-in-Play Duo
Air-actuated options
M&G
Demco/SMI AFO (Air Force One)
These require an air activation signal and will NOT work with all coaches. They may be what you want to install if you eventually buy a coach with air brakes.
Make sure you have a breakaway system, too.
2) Baseplates and Towbars
Jeep owners have options that other car owners don't have, such as attaching the towbar to aftermarket bumpers instead of baseplates. I suggest you search this forum for information on that. If you don't go that route, baseplates and towbars from Roadmaster, Blue Ox and Demco are popular choices.
3) Drop hitch
Any particular coach may require a drop hitch to level the towbar. A lifted Jeep may require reversing the drop hitch to raise the connection. I've seen mentioned on iRV2 hitches with as little as 2 inches drop and as much as 16 inches. You need to have drop hitches available, as the coach you deliver may not have one.
4) Lights
The Jeep will need lights to be legal. Multiple options. Search the forum.
5) Other thoughts
Some coaches may not be able to tow more than 4,000 pounds. You might consider purchasing a smaller, lighter toad, such as a 2014-or-earlier Honda Fit, to use for this "delivery business." This would reduce wear-and-tear on the Jeep. You can buy already-modified toads on the iRV2
Classifieds.