CombatOps1911:
The best answer you got here by far was from JWarren.
I congratulate you for your selection of the M1A and finding a pretty good price for one. My go-to rifle is an M1A scout with the 18" barrel. I am building a second M14, but this one will be with a 22" barrel and will primarily serve as a "game" gun for high power.
Once you have yourself squared away, the best thing you can do is building a little community. Get your neighbor or shooting buddy down the street into the same line of thinking, and "pair up" on getting gear. Solar electric equipment, training, communications stuff, food, water purification gear, stuff like that.