Buy two guns isn't going to do anything. As a matter of fact, I'm not sure if The Man would even be aware. If you got them both at the same time, only one background check would be performed as opposed to one for every purchase.
A good resource is Paul White of Myfavoritegunstore.com. You can email him at
myfavoritegunstore@gmail.com with your questions. He is up in Richmond and has handled many of my firearms transfers. He is my goto guy when I am shopping for a new gun, and the one that taught my CFP class, as well as the Hunters Safety classes for my kids.
He has a very good day job and only does the FFL thing as a hobby. He'll give you good information when you ask.