Tape, paper clips and a shoebox have launched more ideas than any fancy supply store.

Crude materials carry a low enough stake that you are willing to ruin them, and that willingness is what lets a first version get made at all. Good supplies invite care, and care at the beginning slows everything down. A rough mock-up exists to answer a question, not to survive.

Use whatever is in the drawer for the next test. Save the good materials for the version you already know works, and let the cheap round be as ugly as it needs to be.