Anyone make a mistake buying first MH ?

Well I know this is a thread about mistakes and we are just getting in and are about to find out. We just bought our first RV and went right to a 2005 40 ft. 4 slide 400 hp DP.I have driven large straight trucks and semi's over the years used to have a CDL. So size doesn't bother me in regard to driving. We are about two years out from full retirement so we are going to spend these two years getting familiar with our rig. I restore cars so the maintenance and things breaking does not concern me. This has been a life long dream and have spent the last three years researching rigs. Paid cash, so never going to be under water. Already know some things we want to change with it and I will do myself. so I guess what I am saying I think I did the upfront work to prevent the mistakes but time will tell and I will keep you all posted as we move forward in the next chapter of our life. See you soon