I am probably suggested using a 2P-30A to protect the #10 AWG conductor insulation.
The norm for selecting motor circuit protection is to select a device (fuse or c'bkr) that is about 2.5-3.0 time the nameplate FLA.
30/12.5 = 2.4 which is within spec.Absolutely. See above.
Part of the reason I suggested using #10 AWG wiring is that it provides just about the lowest cost solution available.
Buy a 25 ft long, 2 conductor with ground molded cord set, then cut of the molded ends and wire up your saw on one end and a suitable 240 VAC male plug on the opposite end.
I'd use a locking device, but that is just personal preference.
Lew