Get something that doesn't require a tow dolly. Take it from someone that used a tow dolly for 5 yrs while full timing. Yes the dolly allows you more flexibility with the type of toad you can have. But issues will arise when you park, now you have to store the dolly. Time spent on loading the car on the dolly, getting it centered on the dolly, straps to retighten periodically. If you get in a bind and need to back up. To read it doesn't sound like much until you are out there. But if a tow dolly is what you decide on then get one with surge brakes and NOT electric brakes. I've seen a lot of dollies out there with no brakes. Some states require you to have some sort of braking system. Go 4 down and save yourself some aggravation.