Hi Ibean and welcome to Fish Lore
A Betta and a few Otos in a 10 gallon tank is not a problem

As for the Swordtails ... our expert Chickadee will surely have an answer for you.
If your home is only an hour's drive from the campus, I don't think it should be a problem to have a tank on campus for you. If you will be transferring the fish during cold weather, just make sure the car is warm enough inside to keep the temperature of water in the bag with fish warm until you get home. You'll have to empty the tank of the water. You don't have to remove the gravel and the decor, just the water. If you'll have any live plants, keep them moist during the trip. Keep the filter media moist as well. Though the beneficial bacteria may start dying off after 30 minutes without filtration, I think that if you keep the filter media moist and well oxygenated, you won't lose the bacteria. Once you get home, quickly fill the tank with water of the temperature appropriate for fish (the temp. in the bag with fish should also be similar to that of the tank's temp. to avoid any temp. shocks to fish) and hang the filter back on the tank and turn it on. Then slowly
acclimatize fish back to the tank. This means floating the bag in tank's water, with tank lights off (room lighting should also be low). While you're floating the bag, pour some of the tank water (say, 1 small cup) into the bag every few minutes. Do this for an hour or two. Then, net the fish and release it. Turn the tank lights on the next day. Feed the fish the next day as well.
However, if you will be going home for only a few days, maybe someone will feed the fish for you in the meantime? You could ask someone. This would be better than transferring the tank a few times a year. Though I understand, you'll be taking the tank home for the summer break.
Whenever you transfer fish from one tank to another (or - in your case - change 100% of the water, as you'll need to do during the transfer), check the pH and nitrate of your current tank water and the tap water. If your tank pH and nitrate and your tap pH and nitrate are very different, the transfer may pose a problem since you'll be changing 100% of the water.