I've been dollar cost averaging my ammunition for about the last 10-12yrs. I consider it an investment in shooting futures...
I buy a bit out of every paycheck which isn't meant for immediate or even short-term consumption. Out of every paycheck, I buy a SOMETHING on the list of a couple hundred 22LR, 17HMR, 17WSM, 100-250 9mm, 380, 45, 40, 357sig, couple hundred bullets, few pounds of powder, couple thousand primers, etc. Usually knock out at LEAST $100 every two weeks. If shooting high volume and never running out is important to you, then building your inventory NOW is always the best time. Ammo prices don't ever seem to go down, as confirmed by some of the price tags on my ammo boxes from over the years. I run a first in, first out game also.
However - a civilian in a residence does have to be mindful of their storage method. Fire Codes typically limit residential homes to 50lbs of powder. Not everyone complies with this limit, but laws is laws...