I'm in love with these(I know they won't be everyones taste but stay with me ). But i'm wondering if i should buy or i should try a DIY project?

I have a coupon code to make them cheaper but i know as soon as i wear them people will scoff at me and say things like, "i hope you made those yourself" etc etc etc.

The knees would be easy to do but i'm not sure i could get the bleaching right. Finding a cheap pair of skinny jeans that are 100% cotton is difficult and i've never tried to bleach anything that was a mix of synthetics because i heard it doesn't work well? Anyone else have experience with this? I know that's maybe a long shot but i've tried to google without a lot of progress and i hate to ruin a perfectly good pair of pants...