I will throw an idea (that I'm using myself), it's nothing new, but could work:
Look for services here, and try to sell them in other forums. For example, logo design or xrummer blasts. Spend a bit of your $300 to pay the free reviews you are going to give away, and then you will recover your expenses plus profits.
I'm marking 100%, but you will have to find the right number.
I repeat, this is no new method, I actually learned here. Feel free to PM if you need more info or if I can help you in any way