A few other things to consider besides the ability of the TV are:
What do you need? How big is the family? Do the kids need their own beds? Do you mind converting the dinette into a bed? Do you mind or like sleeping under a canvas bunk end as in a hybrid TT? Are the kids able to grow into it or will they end up in their own beds or a tent at some point? How much time do you spend inside while camping? Some people spend a lot of time inside while camping while we tend to be outside most of the time. I can see where a gourmet chef would want a bigger kitchen while we are happy with a small one as we do almost all our camping over a campfire.
Where do you like camping? Air conditioning won't run w/o a generator or hookups. Generators are big, heavy, take up a lot of room and are probably not permanently installed in a camper the size you are looking. They also require gas which means a possibly smelly gas can somewhere in one of the vehicles. Or you can go to a campground with hookups. These are fairly expensive and TEND (not all the time) to be more cramped than dry camping CGs. We prefer to go high enough and into wooded areas where we don't need AC.
With 2 kids, 2 labs my wife and I we use about 30 gals of water for 4 days. We haven't needed the showers so that is for drinking, cooking, dishes and flushing the toilet. Again, we rarely have hookups so we carry the water with us. With a cart and a few jugs you could fill up fairly easily but we just take it with us and accept the extra weight. 43 gal @ 8.35 lb/gal is 360 lbs. I'm about to install another tank under the back of the trailer to balance the weight better.
Batteries and propane are usually mounted on the tongue. How long are you going to stay out without hookups? With one battery you may be limited to just a couple days without recharging a battery depending on your use of course. Less if you run the furnace. More batteries add weight to the tongue. A generator will charge the batteries but slowly and inefficiently. A solar charger may be good if you like dry camping. Propane last a long, long, long time and 2 20 lb tanks are cheaper and weigh less than 2 30 lb tanks. Mine came with 2 30 lb tanks but I'd be just as happy with 20 lb tanks.
Sorry for the unsolicited advise but these things could make a difference when it comes to making a choice.