If you're in the US, go to Michael's and get their Artist Loft brand. 12 colors for $10. It works just fine, and they're small so you can transport them to places. If you want more for your buck, get this https://www.amazon.com/gp/product/B08GFTGGVT/ and then get the 1oz jars I linked for you earlier (less easy to transport though). Regardless, there are cheap solutions, just there isn't good travel solutions. Use watercolor and color pencils for when traveling, gouache at home.