[KmH]

For an art fair yes matted in plastic is appropriate. How would you display matted and bagged prints?

100 frames for $1000 would be dirt cheap, that's only $10 a frame including mat and backing. For decent framing I'd think you'd be looking at over $5000 to frame 100 images.

Mpix sells framed 11x14's with a 2 inch mat at $42 and up (no glass). But you'll be doing your own printing so you'd have to find a frame shop or buy frames and mount the prints yourself. That's a lot of work to frame 100 prints.

How long till the show?

I would seek counsel from the Community Art Association on what their expectations are too.