[FrankJ]

For regular hook up wire 12 gauge & smaller, 500 ft spools seem to be the best price point. For most teams 500ft is several years supply. Especially if you consider you are buying different colors. Cut length pricing is generally is a lot higher than spool pricing so if you are buying smaller quantities you should compare pricing .I like type MTW for the flexibility, but building wire (THWN, ETC) is generally more available.

For smaller quantities it is worth making friends at a local electrical supply. Explain who you are & what you are doing & they might be willing to make a deal or donation.