platypus,
Good suggestions, but most of them aren't feasible.
In response as to how I'll be handling money, I will expect payment immediately after service is delivered (there on the site). This will be clearly stated so the customer will know they must pay that very day with cash or check. Gaining something to handle credit cards would be far too expensive and I don't think this job will be generating that much traffic anyway.
A laptop is a great idea, but I don't have one and cannot afford one. I'm trying to get this started with a bare minimum investment. A laptop may be a good investment once I've generated some income to invest from doing this work.
As for downloading drivers and what-not, I plan to do that from home. I'm going to burn some CDs of drivers and updates and carry those with me to the sites. WiFi is still very rare in this town, and we don't have a Starbucks to speak of
Thanks for the suggestions, they're very logical.
tinfoil,
I was hoping to cover the liability with just a big fat disclaimer. Maybe I'll draw one up and have them "read" and sign it before I begin working on their computers.
Thanks a lot guys, and keep it coming!