Meredith I think your long term goal is where you are thinking.

You said, "Do I expect fame and fortune? Hardly. But I think that success in this gallery would open up other doors -- NOT doors where I'd have to dolly 500 lbs. on 17 trips from the parking lot. "

So you're expecting to use this as a stepping stone to something bigger and better. Right? So, it sounds like your wanting to accept the offer if you can get it. That's okay because you've got something in your mind where you want to go and this may be were you need to be for now.
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Sandpiper
"Kaleidoscope Memories: Childhood Stories That Celebrate Family Life" - 2008
http://kaleidoscopememoriesbook.blogspot.com
www.tidedancer.com