My suggestion is to spend 75K on the beast leaving you with 5K for repairs and upgrades. I just bought a 1994 very clean Winnebago Adventurer 32 feet. I bought Winnebago as back up support, numbers of owners, and third party support is just about the highest of all brands.
But when I purchased my new - to me - RV I left lots of money in the kitty for new tires, upgrades and replacements of dated looking but working equipment, swap over to LED's, maybe a new fridge, etc. If you don't spend all your money, you will have extra to make improvements which you will enjoy in your future travels.