The removal is straight forward, just take everything off that's in the way, there's nothing that can really cause a problem or that's very difficult. You'll have to take off the rear shock preload adjuster too, but that would be obvious when you get to that point. The wiring loom is minimal at the rear of the bike, just there for the tail & stop light, the indicators and the number plate light. There is a connector that unplugs when you take the rear lights off, then it's easy to get the loom out of the way to get the subframe off.
Edit: the exhaust should be fine unsupported since you're not going to be riding the bike.