a standard gel tank only has electrodes at 2 ends so multidirectional dna movement is not possible but there is FIGE ( field inversion gel electrophoresis) which pulses only in opposite directions so with the right electrics box to invert the current between the electrodes could work but the control box would not be cheap
Yes the voltage needed for pfge is quite low but it does need cooling unless very low voltages and long run times are used but the most expensive part is the switching elctronics box but most pfge are run using a hexagonal array of electrodes which really need to be used in a dedicated and specially designed tank with cooling
You need an electophoresis called Chef DR II or III to do PFGE. Because for long DNA fragment, the current should go in several directions and not only one like usual.