This is purely a hobby for me, everything is at cost (this includes covering paypal fees, WHMCS, cpanel, fantastico, sitebuilder, domains, server, colo, etc...) I may make a few extra pennies from advertisements. I'm just about topping off my second server (just under 200 clients - I leave enough room for ALL my clients to upgrade to the largest package on each server). To cut costs, I answer tech and sales questions only through email and support tickets, but everything is answered rather quickly since I do most of my work on my phone.