Texans Ken and Patty Urban would do one thing differently if they had it to do over again: Rather than trading their way up the ladder from RV to bigger RV to luxury motor coach, they'd start nearer to the top.

The top, in this case, refers to a luxury motor coach that resembles — but should not be confused with — a recreational vehicle, commonly known as a motor home.

Motor mansion would be more accurate. Or castle. Or — as some refer to them — land yachts.

Ken and Patty are members of an elite group known as Prevost Prouds, an organization of people who own the world's most luxurious motor coaches. They crisscross the continent in multi-million dollar marvels of space-age engineering and comfort that are, in many cases, furnished as elegantly as any Beverly Hills chateau.