There's no dogmatic position on such a thing, certainly not one based on the cited passage which isn't a flat condemnation of buying/selling within sacred grounds, but a very specific condemnation of the way money-changers in the Temple were ripping people off and abusing them.
So setting up a bake sale in the narthex of a church (as an example) is hardly a problem.
I would, however, condemn turning part of a church into a storefront, for example setting up a Starbucks or a McDonalds would be rather inappropriate.
So it's not a rigid, dogmatic, black and white issue; but a case-by-case issue. And, again, the Gospel text cited in the OP wouldn't really apply in the vast majority of cases--even in cases where I (and many others) would consider it deeply inappropriate.
In a large way it comes down to a recognition between the sacred and the profane. That having a bake sale would be completely fine. Installing a full scale bakery, probably not so fine. But opinions on such things are going to differ--that's where I stand. I don't think having a bake sale confuses the line between sacred and profane, while using part of the church as a profit-making enterprise is definitely a confusion of the two. The church is sacred, the building itself is sacred, because it is consecrated to the specific purpose of being where the faithful gather to receive Word and Sacrament.
The issue is firmly in the grey area, neither black or white.
-CryptoLutheran