It's not bad at all.
The hardest part is getting the new pump lined back up in the bore.
You don't need any real special tools, other than the gear puller, which is about $20 at AutoZone.
Everything else is hand tools. 10, 13, 17, 19 and 24mm wrenches, a 13 & 27 mm socket, 1/2" and 3/8" ratchet with extensions and u-joint, and a torque wrench.