My Garmin cost me 349.99 with free life time upgrades. I can set trailer height and width and warns me of low over pass. It also list truck stops along my route, where I can get propane, RV Parks, RV Repair, live road conditions and traffic, live road construction and even weather along my route. I can even bring cameras up along my route and check out traffic in real time.
I have updated mine several times this year to keep the map current - try to go though Dallas from north to south using maps that are a couple years old.
