As someone else mentioned; the Armada is not a nimble, easy daily driver.
My daughter's 2012 Armada is almost as much of a PITA in parking garages and shopping centers as my 2006 long bed 1-Ton Silverado (crew cab). Not quite, but almost! AND, I'm certainly not suggesting a one ton long bed crew cab for what you are trying to do.
In town (without the trailer) my Duramax Diesel gets better mileage than her gasser Mada. Week in; week out; every time.
On the highway (without the trailer) same results. Every time.
Diesel fuel is more expensive, but we probably break even on cost for the same number of miles (she drives a lot more miles per week than I do when we are not on the road).
She pulls the ski boat. I pull 13,800 pounds of trailer.
She can put the dog in the back to go to the Vet. After pulling the hitch (10 minutes) I can drop a ton of gravel in the back for a landscaping project.
It appears that you have decided what you are going to do and want somebody to agree with you. If it makes you happy...DO IT! On the other hand, you may have shut some doors without trying the alternatives.
Have you considered renting a pickup for a week and driving it everywhere? Sure, it isn't cheap to rent but it is a lot less expensive than buying a tow vehicle and then finding it isn't satisfactory.