I am kind of sort of maybe (okay, definitely) rethinking my Habu project

It’s not that I don’t like the yarn, BUT, the knit up fabric is very thin. Which is also not in and of itself problematic. However, the more I think about it, the more and more I realize the project I originally envisioned with this yarn somehow had it a bit thicker, and that extra thickness really is integral to that particular vision. In other words: This Thing Is Not Really Working Out, But It’s Not You, It’s Me. So now I have two options (that I’ve thought of so far).
1. Double strand the silk yarn and go on with the originally planned project. I’ve made a swatch to that end:

Pros: I’ll get the piece I originally envisioned. Cons: I’ll have to buy quite a bit more silk.
2. Double strand the yarn but make a new, less yarn intensive project. Pros: Don’t have to buy as much new yarn, also will not be knitting piece forever as is likely to occur at current gauge. Cons: Good chance I’ll still have to buy some more yarn, just not as much.
3. Think of a new design that is suitable for current gauge. Pro: Definitely won’t have to buy more yarn. Con: Have to think of new design. Although I do have some ideas.