Raise your price (or take the hit) and move on. Your biggest problem isn't getting paid, it's getting anyone at all to buy anything from you, which needs (1) f

Raise your price (or take the hit) and move on. Your biggest problem isn't getting paid, it's getting anyone at all to buy anything from you, which needs (1) for you to make the thing (2) for you to get customers, but doesn't need for you to solve this problem efficiently. (this is all assuming that you can do this work under your current visa)