This is your first AR. Do you know how much 223 5.56 costed before Obama got the Democratic nomination? On the whole sale side, about half what it costs now, actually less. On the retail side about 1/5th as much as it costs now. (Whole sale prices haven't risen as much as retail prices have). If we ever get a firearm friendly government again I expect ammo prices to drop significantly.
Set yourself on a budget to make sure you don't lose your skills with the platform and wait it out. EVERYONE has said that 223 is too expensive to shoot and has taken out their 22LR's and now you can't even get 22LR ammo anymore.
Even reloading, components are in very short supply. Lots of people took up reloading as the ammo shortage began.
Keep the AR and wait out this storm.