I'll add my two cents... I'll bet that one day you are going to own an heirloom kilt with a family connection. And it will likely remain in the family for a long time. So, why not now? If you need to save, do. It might take a little time, but you'll get there. You won't regret it.

8-yd knife or 4-yd box or whatever style, do go for the best cloth in a heavier (16 oz.) weight.