The general rule of thumb when it comes to starting your own pool: If you have to ask the question, you shouldn't do it.
I agree, sounds like you haven't even mine, you know gpus are done mining you need ASIC miners to keep up.
This is what it sounds like to me. I know many people that already unplugged from gpu.
If you are coming into a large sum of money then ASIC is the way to go unless this is just a hobby then you have nothing to worry about.