Find someone who is a local merchant that has some very limited space(maybe a small room in the back away from thier stuff) Rent this space, do all transactions out of the building, recive mail ect. and do the smithing at home. That will cost you less trouble in the long run. Use it as appointment only...
You can't do just the gunshows and internet and home. You have to have a location like a storefront to be legal. (remember the gunshow loophole hoopla years ago? This is part of it)
Remember, always do EVERY transaction(exchange or sale of FFL weapons) at the store. If you don't it can cost you your licence and its a felony.
The upside, the store owner will be there to accept your shipments for you and your mail...that will leave you free from distractions to do your work. Good luck!