System setup

I am new to high end home audio and Audiogon. I am ready to purchase a high end system and would love to do so through Audiogon but, honestly, I don't think I'd be able to set up all the equipment properly to optimize performance. I'm not comfortable asking my local high end audio store(s) to do it, or even pay them to do it, because I wouldn't be buying the equipment from them. Any suggestions? Thanks a lot.