Can my artificer make a bag of holding everyday and then sell them for gold? And yes I have the infusion for this.
You can only have one bag of holding active at once
In Eberron: Rising from the Last War, p. 57, under the Artificer class description, the section Infuse Item says:
Infusing an Item
Whenever you finish a long rest, you can touch a nonmagical object and imbue it with one of your artificer infusions, turning it into a magic item. [...]
Your infusion remains in an item indefinitely [...]
You can infuse more than one nonmagical object at the end of a long rest; the maximum number of objects appears in the Infused Items column of the Artificer table. You must touch each of the objects, and each of your infusions can be in only one object at a time. [...] If you try to exceed your maximum number of infusions, the oldest infusion immediately ends, and then the new infusion applies.
It makes it clear that you cannot use the same infusion on one object, so you could, at most, make one bag of holding at a time, and if you created another one, the first one would cease to be a bag of holding.
If you skipped town after selling one before you made a new one (thereby making the one you sold become a mundane bag again), you could in theory make a profit, but your reputation could soon catch up with you...