Listen to the guys who say you probably won't spend less cash. I spend an average of $75.88/mo.
On the other hand this is feeding my habit of about 1000 rounds/mo of .38 spl or $3.80 a box and these are premium rounds with clean shooting copper plated (and pretty) bullets that shoot like *I* want. I would pay $7.50 per box of 50 from a reloader and as much as $15 from the factory.
You definitely need to feel spending some personal time is worth the cash savings. Experimenting is a fun way to spend time, but mass production is mass production. The other day I did spend 2.5 hours examining 500 cases that had just been cleaned, setting up the bullet seating die for a different bullet, verifying powder charges, cranking out 400 rounds and putting them into trays. I am no speed demon, though, and find the reloading bench a good place to escape life's commotion--or escape doing the dishes.
For startup I invested pretty much as follows less tax--which varies with location:
Hornady Lock-N-Load Auto Progressive -- $250 (normally about $310)
RCBS 5-0-5 scale -- $58.50
RCBS Lockout die -- $21.95
Hornady M3 (large) tumbler -- $59
Hornady calipers -- $36.00
RCBS carbide dies -- $30.95
RCBS primer flipper -- $2.95
RCBS bullet puller -- $19.50
Lyman 47th edition reloading book -- $15.95
Speer #13 manual -- $13.25
For a total of $508.05 for tools and books.
Er, then there was the $120 tool bench from the local Home Base store, so call it $628. No scrimping, but nothing extra. Don't need case trimming and lube for non-MOA accuracy.
Not cheap, but over the 5700 rounds loaded thus far over the last 5 months the savings has been $421.80 over professional reloads and as much as $1276 over commercial ammo of similar grade. Either way, the gear will have paid for itself in another couple of months.
Then $87 startup quantity of components for 1000 rounds plus powder enough for an additional 500 rounds:
Accurate Arms #2 powder, 1lb-$18
1000 WSP Primers-$17 (after those gave out bought 5000 for $50 at closeout sale)
1000 West Coast copper plated .38 spl bullets -$52 (includes shipping)
For a total of $595.05 (less bench) to get out the first 1000 rounds.