You need to check the towing capacity for your car. Be realistic about how much extra weight will be in it with water tanks, food, equipment, etc. We had a Highlander but had trouble finding something we could tow. So my hubby got a new pick up, much to his delight. Given the market right now, salesman are desperate and may give you incorrect info to get the sale. Look into a lite or ultra-lite. A tent trailer will definitely be towable but not as warm.
We have a Salem (who do make a lite) and we love it. 23 ft. and can sleep up to 6. Wildwind is made by the same manufacturer as Salem but Salems are cheaper. Get a model from the last year to save money. I believe ours was $17K.
Some things we love about it. The sofa folds into a bed so we don't have to mess with folding the table up and down every night and morning. This is a huge plus and both of our kids fit on the sofa. Instead of sheets on the beds, we just use sleeping bags and store them under the large bed. Get one with an outside shower-perfect for beach camping and rinsing off sand. We also have a electrical converter for the battery and are looking into getting solar panels. You may want to purchase a small generator too. Get a dutch oven-you can cook anything on the campfire-even cake!
It's great to be able to leave the trailer parked and take off in the car. My parents have a motorhome and it was a hassle before they had a tow car (plus upkeep is more). Trailer regisration and insurance isn't too bad.
The only reason we don't use it more often is because most campgrounds fill up well in advance. State and national parks reserve 6-7 months out. We use it about 4-6 times a year. We are heading to Grand Canyon in May.