Need Some Advice on Used TT Purchase

So--

Cargo in the Armada itself can not go over 1421 lbs.

Vehicle Weight: 6800
Occupants: 575
Car Seats: 50
Extra: 100 (Tops)

Weight: 7525


GAWR Front is 3200 lbs
GAWR Read is 4200 lbs
GCVW: 14,600

Left: 7,075 - 15% = 6,014

20 lbs fresh water (8 x 20)= 160
Clothes/Food/Gear=250 lbs

Left: 5,604

That sounds about where I actually SHOULD be. Am I looking at it right?

No, you're looking at it wrong. You need to look at the numbers for your tow vehicle first. Forget about the trailer.

What is your Armadas payload rating? You'll find it on the sticker on the drivers door jamb. The payload is simply the amount of weight the vehicle can carry up to its max GVWR. It includes passengers, gear, hitch, and tongue weight added to the truck. Or to put it another way it is the GVWR minus the empty (curb) weight.

Your GVWR is 6800lbs. From the internet the curb weights seem to average around 5100lbs. So your payload would be in the neighborhood of 1700lbs. (6800 - 5100) but check your sticker.

From the 1700lbs in this example you'll need to subtract the weight of any people and stuff you will carry in the truck while travelling. So take off 575lbs, 50lbs and 100lbs leaving you 875lbs. Factor in another 75lbs for the weight of the hitch and you have 800lbs left over. That is what is left for the tongue weight of the trailer.

Now you can consider the trailer. You mentioned earlier that the dealer said tongue weight is included in the trailer weight. If the trailer was not hooked up and was sitting on a scale alone then the tongue weight is included. However, once you hook the trailer to your truck and raise the jack then a percentage of the trailers weight is now being carried by your Armada. How much varies for every trailer and how it's loaded. The average for stable towing tends to be around 13% of the trailers LOADED weight. Forget the dry weights because you will never tow it empty.

A trailer that weighed 6100lbs (loaded) would have a tongue weight around 800lbs assuming the 13% average. The average family will add 800-1200lbs worth of stuff to their trailer. To be safe I would look for a trailer that was around 5000lbs or less delivered weight (not dry)

Again these are hypothetical numbers. Only way to know for sure is to load up and hit the scales. If you're not able to then you can estimate your weights or some people will use 13% of the trailers max GVWR as an estimate. If you're safe with the tongue at the trailers heaviest allowable then you will be safe at any weight under that. I don't personally because I will never load it anywhere near my GVWR so why account for weight I will never take.