Hi Rita
Not seasoned but I'm having luck by keeping them in a spare fridge or two in the barn, along with other flowers till I can get a real cooler. I think if you wanted to keep them in an a/c bldg, you'd have to keep the temp down in the low 40's to be of any assistance.
Where are the markets you are going to on Tuesday and Friday's, are they in San Ant....?
Did you get the info on Wollams gardens I sent you?
Cheers - Kim @ Billabong Fresh Flower Farm

I keep them in two extra fridges in the garage, in preservative water. They don't seem to mind at all. I'm sure a real florist cooler would be better, but this is working out just fine, and used-but-functional fridges are cheap. The one stipulation is that you can't keep fruit or veggies in the fridge with them, or the ethylene gas emitted by the food can cause the flowers to mature (wilt) early. Keeping canned or bottled cold drinks in that fridge, for when you need cooling down yourself, is just fine.

Jeanne