Slow down a bit.
Give us a chance to respond to a Reply before posting another one about the same thing - or wait until you have made up your mind before posting a Reply.
Referring to Reply #6, the motor has a 1.5ohm coil resistance which, with 1.7 amps, implies 4.3 watts - say 5 to give a margin of error. So 7 motors would require about 35 watts. I would go for a 70 watt power supply which implies 6 amps at 12v or 3 amps at 24v.
Obviously a power supply with more amps would be fine.
...R