Driftwood/branch decorations/sculptures?

I'm currently trying to make small decorative objects out of branches, with the idea of ​​selling them as a small business at some point.

However, I'm currently having trouble connecting the individual branches. Hot glue has worked best so far, but it's just too porous and looks terrible, especially for sale. I've also tried two-part glue, but it's quite difficult to apply and simply too expensive. I'm worried that screws and nails might break the branches. Wood glue doesn't work because I can't apply any pressure.

Does anyone have an idea?

P.S. What would be a suitable price for the Christmas tree? It's all about maximizing profit, but it should still be low enough that it will sell.