in the Eberron: Uprising from the last war, p. 57, under the Artificer class description, is in the Infuse Item section:
Infuse an object
Whenever you have finished a long pause, you can touch a non-magical object and infuse it with one of your artificial infusions to turn it into a magical object. (…)
Your infusion remains in one item indefinitely (…)
You can infuse more than one non-magical object at the end of a long pause. The maximum number of objects is shown in the Infused Elements column of the Artificer table. You have to touch each of the objects and Each of your infusions can only be in one object. (…) If you try to exceed your maximum number of infusions, the oldest infusion ends immediately and then the new infusion applies.
It becomes clear that you cannot use the same infusion for one object, at most one Bag of holding at a time and if you created another, the first would cease to be one Bag of holding.
If you skipped the city after selling one before making a new one (making the one you sell back an everyday bag), you could theoretically make a profit, but your reputation could soon catch up with you …