I work with kitestring a lot, and have some experience in rewinding stuff on reels, etc....
I hope this does not set your teeth on edge, and it is not my intent to make you mad...to prove it, I will be happy to have you take a "tax" from my portion for your taking good care of my order. I think 5% would be fair. If everybody felt this way, you would end up with 250 feet of the 5000 foot buy. You should not have to pay for your share, in my book, to pay you for your organizing and making the buy, and measuring and distributing the shares.
Have you given any thought how/where you will be measuring/pulling off/rewinding this huge amount of wire? It will be a major pain in the butt to keep it clean and unkinked and untwisted.
There has been discussion about kinking/breaking the wire. This can be minimized by winding off the supply reel and onto the distribution reel in the same curve, ie: if the wire feeds off the top of the supply reel, it should be wound onto the top of the distribution reel. You might want to set up a cordless drill to wind the wire onto the distribution reel. It is important that you not hold the distribution reel in one hand, and just wind the wire on like you would wind an extension cord on your forearm, as the small size of the mailable reel will make you add many many twists to the wire as it goes on.
Please, Please understand that I am not saying this because I am looking a gift horse in the mouth, just that I am looking for perfection, and here is one area where it would be relatively easy to keep it nearly perfect.
I hope I have not offended you. If you feel angered, insulted, or put upon, then simply delete my order, and remain happy.
Thanks again for your efforts on my behalf.