Rent another motorhome. Seriously. You want to leave in 3 weeks for a 2500 mile trip with a proposed TV that will be over its ratings with no experience towing. Is this a vacation of torque test? That does not leave much time for practice, shakedown trips, or WDH adjustment.
Mid-size SUVs are very limited when it comes to towing high walled RVs with a family onboard. People tend to add about 1000 pounds of items (food, cooking, cloths, towels, spare parts, tools, chairs, toys, etc) for a long weekend. For a long distance trip, you may be approaching 1500 pounds over dry weight. Also, you can expect loaded TW to be in the 12-14% of loaded overall weight in order to help it remain stable. So if you are looking at 6k pounds dry, then, you will likely be around 7500 pounds with 900-1000 pounds of loaded TW. In order to keep all the vehicle ratings (towing, GVWR, axles) under specifications while towing with a family of 4-5, you will want something with at least 1500 (1700-1800 better) pounds of as equipped payload noted on the Tire and Loading sticker, 900+ pound receiver rating, as well as enough tow rating. If you are restricted to FCA, then you're in a 3/4 ton crew cab pickup.
You do not need an integrated brake controller. The better aftermarket ones are under $150CAN and take 10 minutes to install, 9 of which are mounting. Fine tuning the weight distributing hitch is key to comfort and stability. My design is a a little more picky about being adjusted more precisely than most. I have had 60mph feel scary to my wife as a passenger, or 75mph be rock solid with only WDH adjustment differences.
A & A parents of DD 2005, DS1 2007, DS2 2009
2011 Suburban 2500 6.0L 3.73 pulling 2011 Heartland North Trail 28BRS
2017 Subaru Outback 3.6R
2x 2023 Chevrolet Bolt EUV (Gray and Black Twins)