Would you rather I call or e-mail questions to you?
Either is fine, though my responses to emails will be slower. I can also use text messaging via mobile phone 210.367.3420, AIM chat to s1r4real
(which forwards to my Treo), Skype to jjmarcus, remote control over secure VPN, Morse code, smoke signals... ;-)
What is your billing policy regarding questions by phone or email or whatnot, i.e. when you're not on-site?
I charge per hour, pro-rated, for whatever interaction I have with clients, excepting getting-to-know-you calls or meetings, and little one-off chat messages. $60/hr for homes, non-profs, and artists; and $100/hr for businesses.