With a decent mattress our bed is really high and we are both over 6 feet tall. Bed height is just not going to change from one RV type to the next. Buying the wrong RV happens all the time with people that have not RV'd much if at all. People just don't realize how small an actual RV is until they live in them for an extended period of time. Changing from a MH to a fifth wheel is going to cost you a lot of money. First is the loss trying to sell your MH. Then there is the purchase of a suitable truck and then the trailer. Are you prepared for all that much outlay in money?