Since the Clinton era, the BATF really wants you to be in business for the purpose of making a profit, if you're going to be in the business at all. I know a couple of the "kitchen counter" FFLs who have got the license after to the tightening down... But they're actually trying to make money, and not just get a few guns for them and their friends.
Basically, when applying you need to send proof that you've notified the sheriff/chief of your intentions, get the fingerprints, along with the forms, etc. etc. Ther'es free guides on the interwebs. In addition to the federal stuff, you have to follow the rules for your area like any other home operated business. So, if your area's zoning doesn't allow for the sort of home business that receives traffic, it might be a non-starter if the agents notice this and deny.
If all you wanted to do was have the FFL to order up a few guns a year, it's probably not even going to be worth the time invested in getting it setup.