Anyone make a mistake buying first MH ?

I have made mistakes buying big vehicles. I love buses and have three ex transit buses. One has been converted to a living motorhome needs a new bathroom and Generator. but before my three buses I lost a few and mistakes are great opportunities to learn something. When you have your head in something like a bus or motorhome, your fear factor is lessened and also you have confidence and fortitude to take a vehicle across the country. the more you work on it yourself the more you can get your mind wrapped around the RV. I got my first bus, that huge engine the huge tranny then the air system I wondered why I got a bus, The "what ifs" would enter in then I learned all I could, so if a "What If" came up I would fix it, also the BIG "what ifs" can be totally avoided.