If you are planning on dwarf seahorses, neither college life nor the 14g cube sound very fitting for the dwarves or your schedule.
Dwarves require newly hatched live food, preferably 3 times a day but it can be 2 times.
You cannot just buy the live food though. You have to hatch baby brine shrimp daily. Adult brine loses practically all nutrition needed by seahorses, meaning that the dwarves would starve rather quickly on old adult brine. So you would have at least two hatchers going at different times all day for each feeding (not even considering that one might fail). That is a good minimum.
Just one individual adult dwarf seahorse typically consumes approximately 3,000 BBS each day! No joke.
The reason the size is too large is that the BBS spread out and the horses will not find it as they are lazy and prefer the food to swim to them. Large tanks require higher feeding densities per feeding. To counter the feeding density issue, you could get more dwarves, but then you have more mouths to feed.

sad but true.
Say you were to get 10 dwarf seahorses, feeding each one 3,000 BBS a day. That's 30,000 BBS daily. I don't think you would be so inclined to hatch all of that with your hours, as I would assume you would be tired by the end of work.
That feeding example would be for a 5g tank. So you would need to increase those numbers for a 14g.
If you have your heart set on dwarves, think about a simple 5g or a cheap 10g. You can use some plexy glass to split the 10g in half (completely seal it off, making a 5g area)
Perhaps a larger species would better suit your 30g softie reef and hours? Larger species do fine with softies generally, depending on tankmates and temperature.
Also, captive bred large adult seahorses feed on frozen mysis; you can feed them before school and after work (twice a day).
Much more simple than dwarves. It just depends on your 30g reef tankmates and corals, in case you're interested.
Unfortunately 14g is not ideal for any seahorse species.
It's too small for the large species and too large for the small species under most circumstances.