.....you didn't mention your budget, but you did mention you want to produce a large quantity of 9mm rounds....that infers a progressive press, one that can do both pistol AND rifle rounds.
....a Lee LoadMaster is an economical progressive that can turn out lots of quality ammo in a very short time. You can buy a complete setup in a pistol OR rifle caliber and it basically will have everything included (other than powder, cases, primers & bullets) so you can start loading right away. I would suggest getting one in 9mm and to load .308 just get a separate shell plate, primer feed, turret and dies for .308. To switch calibers all you would need to do is pop out the 9mm turret, small primer feed & shell plate and pop in the .308 turret, large primer feed & shell plate. I'd also suggest getting a separate powder thru die measure for the .308 tool head so you can just pop the auto-drum measure into it.
The Autodrum Powder measure should come with multiple drums, large & small. They also have a kit of 4 drums (2-LG, 2-SM) if you want to dedicate drums to specific powders & charge weights.
The following prices were taken off the Titan Reloading page, a good source that has fair pricing, good inventory and FAST shipping:
Looking for Lee Reloading Supplies? Titan Reloading is a Master Distributor of Lee Precision reloading equipment & supplies. Call 262.397.8819 to learn more.
www.titanreloading.com
Lee LoadMaster Press, 9mm - $289
.....to convert to .308 you will need the following at a minimum:
.308 Die set -$33
.308 shell plate - $23
extra 5-hole tool head - $13 (optional, but highly recommended)
Large Primer feed - $19
Long Charging Die - $12
SubTotal - $100
You would also need a scale, beam or digital, to measure your charge setting on your powder measure, prices vary greatly as does accuracy. You really only need one of the small digital ones to verify what your measure is dropping, just make sure it includes a calibration weight.
So, for approximately $400-$450 you can fulfill your reloading equipment needs in both of the calibers you stated. If your apartment has counter tops that have at least 1-1/2" - 2" overhang, you can bolt the press to a piece of 1" wood sheeting then use C-clamps to clamp the wood to the counter. Works best if you use the corner, can use 3 clamps, 2 in front, 1 on rear side.
There are those that will demean the Lee LM, but it works and works well...I've been using one for over 10 years for .38/.357, 9mm, .40SW, .45ACP, 300BLK, .223/556, .308/7.62, 6.5CM and now 6ARC. I usually suggest this press to new users because if they discover reloading isn't for them after a bit, it's a small monetary expenditure that most can walk away from if necessary, but one can always recoup some of the cost by reselling it.
Titan also carries Dillon products so you can do your price comparisons. Good luck!