Making something out of scraps is a skill. Plenty of great cooks, builders and producers started that way.

Working with what is left teaches you things abundance never will. You learn what each material can actually do, how to substitute, and how to build around a gap instead of waiting for the right part. That becomes a way of thinking rather than a phase you grow out of, and it stays useful long after you can afford whatever you want.

Make the next thing entirely from what you already have, with no shopping first. Treat the shortage as the brief rather than an obstacle to it. Write down what you came up with, because that trick belongs to you now.