Welcome to the "Roo Kroo"!!!
as you can see, there have been a lot of new 233S owners joining the Forum.
post on the Expandable/Hybrid section here, for your Hybrid-specific questions.
as far as bikes, the best solution is on top of the TV. if you put them on the back of the trailer, you'll have to do a welded and braced hitch receiver mod, which will void your frame warranty.
many do it anyway, but just so you know.
transporting 5 bikes doesn't leave you many options. the roof rack option can accommodate 5 bikes and uses a vacant area. you can also use the roof rack for other purposes, such as cargo, skis/snowbords, kayaks and so on.