We towed a 25' sunline with a 4runner for a couple years. the trailer weighs @ 5500 (loaded), that was all we thought we could tow based on our car specs.
It was not fun sometimes on the highway (with semi trucks) and in wind. Even with the weight distributing hitch we had a lot sway.
So the weight and tow capacity of vehicle will matter more depending on where and how far you plan to drive. (local? or all over the country)
We now have a big truck (f350) and will probably get a 5th wheel one day. We bought the truck so we could upgrade the trailer later. But with the big truck we don't even notice any sway...
You should go to your local RV dealer and look at the ones they have that would be light enough for you now. Once you know what you can tow now then you can decide if you want a larger vehicle and a larger trailer later.
Once you camp a while you will find you may want other options on your Rv that did not seem important at first.
Have fun looking and shopping... there is so much out there!!
