RV workcamping/Hosting regarding vehicle age or size?

Thanks for all the great information ..this really helps with making our decision. To answer a couple of questions asked: 1 . we are going search for paid positions. 2. We do need at least a 30 ft class A. My husband is 6'4 and is built like a linebacker.
We have found several older ( 2000 -2002) coaches in really great condition with low mileage that fit our budget, so its good to hear that age is relative to condtion.
Happy travels !