I guess it depends on what you mean by "shop". If you have tried and true recipes that you intend to offer for sale, I would stick with the one that brung ya :) I have a regular gas oven and a compact Cadco convection oven. It holds 3 half sheet pans, but they didn;t waste a lot of space.
Even with Jock's adjustments, I find that cookies don;t spread as well as they do in the regular oven. I also find that I don;t like the way breads bake in it. Regular pan loaves are OK, but anything beyond that doesn;t really do that well.
In the plus column for you is that quick breads and muffins seem to do very nicely. THey are the closest things to cakes I bake.
Just one man's opinion.
At weddings, my Aunts would poke me in the ribs and cackle "You're next!". They stopped when I started doing the same to them at funerals.www.kyleskitchen.net