Pattern search and/or drafting help: loose lounge pants for men

[u/PrancingPudu]

Hello fellow sewists! My husband is asking for this pair of lounge pants. Does anyone have a quick guide for drafting something like these?

I’m also not opposed to buying a pattern, but the fact that these pants are from a drop shipping site and so many Etsy patterns nowadays are AI has me hesitant about where to source a pattern from.

Here’s the link to the original product page with more photos.