Next to buying a house buying a RV is a big purchase. A house is an investment. A RV is a toy.
Lots of people buy RVs without doing research on what they need. Too often emotion puts the money down. People are always buying mistakes hence the high turnover of RVs for so many.
To the OP, do your research starting with just what will be your use of the thing. The couple we bought out 5er & truck from thought it was a great idea at the time. They bought top end Alpenlite 34'5er & a very nice dually to pull it. This was their very first RV purchase. They planned to fulltime with it. Six months later they wanted out. They wanted out in the worst way. The lifestyle was not for them. They had not done the research of what it was all about. Didn't even rent one for a sample trip.
That mistake cost them dearly. Don't be that couple.