Yep this law or regulation however you want to call it is really unfair. The FFL has to run a check prior to the sale so what's the difference if the sale in Fla., Ky., Mich., or wherever.
Let's say you are out west on a hunting trip that you paid big bucks for, and something goes bad with your rifle. By law, you can't purchase another one so what do you do to complete your trip, watch the others in your group and wish you had brought 2 rifles with you?
Maybe down the road this issue can be worked out to gun buyers satisfaction. Going one step further to what GSPKurt wrote, if are near a Bass Pro go there and see if they can do a deal at the sale price and then have the Bass Pro here in Fla hold the gun for you in sort of a layaway until you get back.
You may not like guns, and chose not to own one. That is your right. You might not believe in God. That is your choice. However, if someone breaks into your home, the first two things you're going to do are, 1) Call someone with a gun, 2) Pray they get there in time.