This seems like such a wonderul idea <3
Some of the priblems I have though, regarding this is the fact that
a) The prices are pretty expensive.
b) It seems like you're doing this for the profit, not for your own enjoyment.
I honestly doubts lots people will be willing to pay a rare/store item/C$ for something that they can't see.
I'd suggest lowering it down to a more reasonable, fair price on their part, or at least making a few 'pre-mades' that they can adopt, so that theyy can see what you can offer.
An important factor in owning an adoptable, is enjoying it. It takes alot of work in order to maintain and run an adoptable. Everything from developing the species that are featured, coding, designing, and everything else in between.
You shouldn't go through that much work for just the profit. Putting effort and your own happiness into an adoptable is what makes the actual adoptable worthwhile. Don't focus on what pets and profit you gain, focus on taking pleasure in what you made.
Other than that, this seems like a good idea. ^^'