There are many choices in this business. I'll mention one or two, and there are many many more.
If you aren't willing to trade 1:1 and show you limit risk and make money, what is 10:1 going to do for you, or 25:1?
I made tremendous amounts of money with 150K to 500K in buying power
Its going to give you 150k-500k bp obviously. I can make money consistently with 100k BP, thats much harder to do with 5k. Thus why prop firms are necessary for some people.