How does that work? Sorry, I'm nosy.
To answer your question, here's what $300 can do:
1.buy programs
2.buy ideas (BH membership sites and ebooks)
3.automate the grunt work by outsourcing or programs
4.buy traffic (ppc or junk traffic, greatly depends on what you're doing)
5.domains, hosting, proxies, blah blah blah
So you gotta decide which ones you wanna combine together to make a plan of attack. If you're on a relatively tight budget, I would do number 2

p) and use the lower cost idea from it. That way, the only expense you'd have is the initial cost of the idea(s) and the little stuff needed for the ideas (#5)
I have no idea if all that I just typed is worth reading or even makes sense, but whatever.