Justin,
Are you using rinseless washes when it gets too cold? At what point, if any, would you go to a rinselss wash?
I'd like to think I might be able to detail for a living someday, but here in Chicagoland, when it gets to this time of year, I can see many people not wanting a detail (or cancelling). Our roads here are salted heavily and as soon as you're back on the road, the white crap gets on your finish in a matter of minutes.

Maybe less full details, but hopefuly more wash+wax customers it seems this time of year.
Thanks for your time,
Pete