Money is tight for startups, but that doesn’t mean you shouldn’t spend it when the right opportunities come along. — I’ll never forget the first “big” purchase I made as a startup founder. My longtime co-founder and I had just launched our new startup together, we were in our early 20s, and we’d been given a whopping $25,000 to participate in a startup accelerator program. To be fair, $25,000 isn’t…