If you are trying to save money, $40k is way too much. Look for a used unit in the $10-15k range. 99% of what you need to watch for is water damage, so you may have to look at many units. Odds are very low that the unit you buy to live in for a couple years will be the same as what you use to travel in for the next couple decades. Doubly so, since you don't know what you like/don't like about your prior RVs.
They all have roughly the same kitchen appliances and they have awnings, so that doesn't make much difference. Find a unit with the layout you like that doesn't have water damage and its a good first pick.