Nice looking installation!
Just a few comments.
You need to be careful with the small, medium, large thing. If you are too overt about that, you will position your work as a commodity item, rather than Art. Sears sells things in small, medium, and large, but your pieces should be "available in custom (or alternate) sizes." Avoid showing different sized pieces of the same image at the same time. If somebody is hesitant, mention that you have other sizes available, but only if you think they're about to walk. If somebody starts to buy a small or medium piece, ever so daintily mention that you have a "version for a large space" available, but do that only if you actually have it right there ready to go, otherwise you can lose the sale entirely to induced indecision.
It is impossible to define a market. You have go find them, and sometimes they hang out in funny places. FWIW there exist large, unsatisfied markets in the middle class willing to buy "reasonably priced" but impressive art in sufficient numbers to make much more difficult, higher $ sales to upscale markets seem inconsequential. Unless your last name is Gursky or Lik or you have a gallery at Caesar's Palace.
Concentrate on galleries with good sales. Drop galleries with poor sales, unless they are a prestige venue.
The value of art is in whether or not somebody wants to buy it. There are many reasons that could be so, but for most buyers other than the rare collector, limited availability is either a non-issue or a very minor one. Most people buy art because it affects them in some personal way, they think it will enhance their stature, they feel it will impress their friends, it's a good color match for the sofa, and it's "priced right", not necessarily in that order.
I sometimes don't even show an artist's statement. But newspaper clippings, screen grabs from TV appearances, and other media related graphics are potent stuff that will cast you as a certified, genuine artist. Talk is cheap, and artist's statements are about as useless as a resume. Media coverage is credible, even when the writers got almost everything wrong, and the editors only made it worse.
But that's just me.