Hi and Welcome to the group.
Basically, unless you can do about 90% of the labor yourself, "Fixers" usually don't work out economically. Having to pay for RV labor is a real killer, both because it is expensive and also, you may fall
victim to having unnecessary work done on your dime.
In short.... Buy the very best condition you can afford. Put a lot of that repair budget into the purchase budget and it usually comes out a better deal.
Gotta tell ya.... There are a lot of projects that never got finished out there for good reason. If this is your first adventure, don't start out with a death march.