Yes and no. I did some googling, and couldn't find anyone selling just the replacement motor. But, the motor are detachable, so they can be swapped out if you have another unit.Another thing to consider is replacement parts. Once an emperors motor goes you have to throw it out . It cannot be fixed.
No its not the easiest thing ever. I've owned them before and its basically like cleaning a canister with a little less hassle. It's not hard to clean, but compared to any competitors cartridge based product - penguin, whisper, aqueon, whatever - it's by far the most time consumingkidding right? The AC110 is the easiest thing ever... It has a big tray that the sponge, bioballs (in a bag they provide) and carbon bag all sit in... Pull it up and out. Drop in bucket, take to sink. Grab some tank water to wash over you bio and then blast the sponge and carbon in the sink... I run 2 on a 125 and have 0 issues with water quality. I changed from a canister to the two ac110's for easy cleaning.