First have abilities!

Before buying a material or machine, one should have abilities (or persons having these abilities) to use or operate it. Even if you have these abilities now or later, you must then protect, retain and maintain it (- as also the persons operating it, in case you do not have the abilities yet). Otherwise, the material or the machine that is to be bought will become idle, rusted and a waste. So, have abilities first before buying these and have also skills in managing it - to get the best performance out of it!