Im brand new at this, need so advice or info from the pros

Can someone please explain this to me. I wanna start doing residential, but my power washer is only 3100psi and 2.5 gpm. Can i buy a bigger pump for it? Or should i look into the x jet, finding it hard to understand all of this. Anything would help, thanks!

Someone just asked the same question, and there are a lot of good responses in that thread. Here is a link to it: