Just some general comments. The used class C should come at a substantially lower price than the the new one. The original owner probably took quite a hit on depreciation, as soon as he drove off the lot. Some or most of the difference in prices should be passed along to you. I'd also be curious as to why a 2015 MH been turned in?
No one here can answer the question of will all the sports gear fit in the cargo space . Who would know how much you want to carry ?
No ideas on whatever Class A you are referring to.
2014 Itasca Spirit 31K