If you looked at my channel, all my experiments are cheap.
I set myself a goal of spending no more than $3 a day on experiments.
All my tools, materials, laboratory prototypes are very small and cheap.
If I had a lot of money, I would spend it and stop experimenting.
And since I have no money and cannot afford to spend above the established budget, I move forward. Donations help a little more. I used them to buy an oscilloscope, a welding machine, chemicals and materials, and measuring equipment. Not that many donations. Lack of money forces the brain to invent and generate ideas.
Don't chase large and expensive materials and tools. You will spend a lot of money, and the experiment will turn out to be negative.
Buy material and tools cheaply and set up an experiment a little, draw conclusions and move on to another experiment.