承包商的付款方式

经过几番反复， 终于买下我第一个银行拍卖房。 现在进入装修阶段。 我需要重新做foundation， 项目总价$21,000. 包括重做two foundation walls total of 50 ft, rest of wall basement water proofing, re-do driveway about 60-ft, and about 400 ft2 concrete patio.

这个价格在合理范围么。 承包商让我pay 1/3 when project start, 1/3 when half way done and 1/3 when project complete. does this sound reasonable. do i need to hold some retention money, say 10% for a few months.

Thanks