Please advise - determining max tow capacity

Thanks for all of your help! Your guys are wonderful!

Here is what I found out from Thor Customer service about my couch by giving them my vin number.

GCWR: 26,000
GRWR 22,000
Vehicle Dry Weight: 16,646.

My flat towed vehicle is 4x4

I will probably only load 1/4 of my fresh tank( I am camping at fully hookup camp site 100%) , that will reduce the load by 300 lbs.

The Weight of the whole family(assuming everyone in the family goes): 860 lbs

Since I am not a full time I do not believe I would carry more than 500 lbs of luggage with me (if I do, I will make reduce it to 500)

Also the curb weight of my towed vehicle DOES include the weight of the driver (165 lbs) since no one will be at towed vehicle when it is flat towed , the weight of my towed vehicle is only going to be 5,856 - 165 = 5,691

So What I can tow is as following:
26,000 - 16,646 (Motorhome Weight) - 860 lbs (passenger) - 500 (cargo) - 100 lbs (1/4 of fresh tank water) - 88 (propane ) - 480 (gas) = 7,334

7,334- 5,691(towed vehicle weight ) =1,643

So looks like I still have 1,643 lbs buffer to play with. Even I fill the whole fresh water tank, I still have 1,343 lbs buffer.

That makes me very comfortable.
Of course I will definitely weight the motor home when it is loaded.

Thanks again to all of you