If you want to avoid all of the "problems" you are having, why don't you just get an FFL in your own name, start a business of your own, get an FFL, comply with all of the local zoning regulations, get a state business license and tax certificate, open a retail store, purchase the inventory need to stay in business? This will cost you with a modest inventory, $50,000.00 minimum.
Once you have done this, invested all that you have in this business venture, THEN you can act as the transfer dealer for all of the poeple like you who do not want to pay a "penalty" of sales tax (which by the way may or may not be legal in some states) making only $20.00 per transaction on an investment of your life savings.
I'm an FFL dealer and I do not do transfers at all. Why? Because I'm in business to make money. Funny isn't it how people like to make a profit at their businesses....
I used to do transfers with the idea that I'm doing people a favor and it bets them in my store. You know what though? I have found that they usually don;t buy anything more from me anyway. With todays internet sales of everything that is non-FFL required being wholesaled directly to the public, the guns are the only place where I am assured a profit, and that the retail customer MUSt come see me to get.
The internet or ShotgunNews or Gun List savy firearms enthusiast (who are the people who need transfer dealers), are also savy enough to get their accessories and ammo off of the net or from those magazines as well. They will come in, pay their $20.00 for the transfer, get PISSED (like our friend tlnzz) is they have to pay sales tax (even though without their friendly neighborhood FFL dealer, he wouldn't be getting this gun at all)!
No thanks on transfers. you want be to buy if for you, OK. Transfer, go see the basement/hobby dealer.