First post....ever.

We began making yachts with 15 boys this past February. We've made some progress. We're incorporating a few ideas from what I've read on this forum. The frame design was provided to us by another fellow here in Salem, UT that built some yachts a few years back. We're making some progress. The boys are learning how to weld (I'm not teaching them, I'm learning with them from an expert). We're now pulling together some of the accessories: tires, rigging, seat belts and such and I have a few questions:

1) tires. I've read many posts and it seems that wheel barrow tires seem like the least costly option for tires. We're thinking of going with a 16" diameter tire (8" hub) with the standard bearings. I think the bearings will leave much to be desired, but we're building 15!... on the cheap, that's 45 tires! Any better ideas that may be less expensive?

2) pulleys. I had no ideas these would be so expensive. I've been looking at harken.com. Any better ideas for pulley sources? How much load is on these pulleys? (has anyone really done the calculations?)

3) seat belts. I've been to a local surplus store and amazon.com. There are a few options, but I'm hoping, once again, to get a cheaper solution. Any ideas?

4)Line. I'm planning on a polyester line for sail control. What is better 22mm or 40mm. I'd imagine the smaller the line, the harder it would be on your hands, but I still want an idea.

5) sails. We are sewing our sails..........

Thanks for ANY advice you could provide