I did a little web surfing and found a couple of interesting products. The following site seems to market through Camping World but the CW site only seems to carry the power cord reels and not the water reels. The pricing for the power cord reels looks pretty good though. CW sells the 30 Amp motorized
power cord reel for $359.10. The manually cranked one sells for $228.99. The power one still would not fit entirely under the floor but it still might be a great choice if I can find a place that I would like to put it. The manual one is a better dimension for under the floor (still too big) but getting to the crank would be a problem. I am guessing that the hose reels would be somewhat less expensive than the power cord reels but I do not yet see where they are sold. At any rate check out the following web site:
There is another interesting product at the following web site:
This is a power cord reel that just runs the cord through it. This would eliminate the problem that was mentioned about bad connections in the rotator. I did not see any prices on the web site though.
For water hoses I did notice several flat hoses that roll up into a very small package. Maybe one of these would be a good way to go for the hose. It seems like you would have to unroll the entire hose before you could use it though.
I am still looking for the ideal solution.