Tak
Some observations on these units from a year of helping a customer deal with his.
Tag or 5th? 5th wheel for sure. By the time you load the car, tools, gear, spares, more tools and gear, and the family stuff the thing will be HEAVY. This does not include water in the water tanks and all the other things that you won't even think about because in the past you had no spare room for that.

Also keep in mind that when the car is in the hauler it will be almost unusable because of space limitations.

The toy haulers are great for bikes, four wheelers, snowmobiles, etc. and are starting to get much better for cars but the learning curve for the manufacturers of these trailers is steep and with times like they are the manufacturers are just trying to stay afloat.
cheers
dave parker