Back when I took a break from planes and was heavy into rc off-road racing I thought it would be great to have a trailer loaded with commonly needed replacement parts to sell at the track.

After doing some research I found there just was no money in it. 95% of guys bring their own replacement parts/hardware. The few sales per week just wouldn't justify the large cash investment. Another major issue is most of the distributers wont sell to a club or individual at a "dealer" price, you need to have a brick and mortar store in order to order stuff and make a slim profit. Now if you had a store owner in your club that could have a satellite store???

Now all that said,, if a group of guys or a club just had a bunch of cash laying around,, why not stock up and have some stuff on hand,, In spirit it sounds like a good idea. The biggest downside to the idea is who is going to manage it?? It's already hard enough to get people involved,, but to maintain a store of products just for the fun of it?? I think you'd find very few who would want the responsibility.