As I see it, you have 4 options.

1. The lifts that lower to the ground for easy loading and raise so that the towed vehicle can still run close to the coach. These will be the most expensive and heaviest. Weight shouldn't be a consideration with that light of a bike.
2. There are hitch mounts that simply pivot to allow you to load and unload the bike. These will be the lightest, but may prove too difficult to safely load and unload the bike, especially if you don't have help. These force you to install a faiirly long hitch extension to support the towed vehicle. I'm not a fan of long hitch extensions.
3. Take #2 and install it on your towed vehicle. This gives you the flexibility to take the bike places you aren't taking the coach. The biggest plus is it gets rid of the hitch extension described in #2.
4. Abandoned the idea of a motorcycle...we all have to at some point.