Personally, I would recommend NOT using those tanks. Just get a plain 5g tank and it will hold up to around 50 dwarfs with no problem. With something to use for hitching, and a couple of open ended air lines for water movement and gas exchange, some reef rock (sterile before cycling) you are set to go. You don't really need much in the way of equipment as you won't need a heater, and most mechanical filters will draw the dwarfs to the intakes that will need to be protected and flow limited so the dwarfs don't get sucked against the protection. I also don't like sponge filters as the food gets drawn into the sponge only to decay and increase chances of bacterial infections.
I would never put tankmates with dwarfs, but then again I don't put them with my standard seahorses either, merely because it gives exposure to pathogens they haven't grown up with and MAY be susceptible to.
Most dwarf keepers will drop the hobby due to the continual work involved in the feeding process. First of all the dwarfs only live about 2 yrs +- under best conditions, but most often don't make it that long because of nutrient problems.
Feeding newly hatched brine nauplii doesn't provide proper nutrition as there is no DHA in them, and, in that Instar I stage the carapace is too tough for the nauplii to properly digest anyway.
This means that after hatching they need to be grown out to the Instar II stage where the digestive tract is completed and they can then feed. Proper enrichment of them will take at least 12 hours to be gut loaded, but a further 12 hours with new water and new enrichment means the enrichment with be assimilated into their flesh for much better nutrition.
Most keepers don't remove the uneaten, nutrient depleted nauplii before adding new brine so the dwarfs are again not getting sufficient nutrients. You don't have to remove every last one but get most of the old food out before adding new.
I hooked up a mini filter with protected intake to a timer that automatically came on a couple of hours after feeding so that the uneaten brine would be removed before I fed them again. Nutrient levels of the artemia nauplii deplete quite rapidly.
You can hatch out 7-10 days worth of food and enrich daily the amount needed for a day rather than hatch out each day. Just keep the remainder in aerated water and add a food to keep them until you enrich them.
As the feeding/enriching process is what makes most people drop out, I'd suggest doing that first for a week or so until you get an idea of the work involved in feeding dwarfs properly. If then you still think it won't be a problem long term, then you can go ahead with your dwarf tank.