1-You need them more than they need you, liveaboard space is rarer than transient.
2-You'll be using more electricity since you'll be there all the time. I pay my own electric plus a common electric fee plus a monthly meter fee
3-Water, again, you'll be using more of it.
On a well?
4-Cable or other, see above.
Available at slip holders cost
5-Toilet facilities, showers, laundry. You'll be using more of all of them.
bathroom is rarely used, laundry is paid per wash/dry like any other user
6-Insurance. Most places CLAIM their insurance costs more to allow liveaboards.
agreed, but why? Liability?
7-Office expenses. Hey, they might expect to get MAIL and PARCELS delivered and held for them. And they might spend hours in the lounge, or on the broadband. Or simply keeping the lights turned on in the lounge.
Have a PO Box
And of course if you live there, you might die there, and the cost of having a dock closed
while the coroner comes, and having a funeral director get out to the dock, and all that extra possible paperwork...you know, you have to charge extra in case that happens too. (sigh.)
, I suppose more wear on the dock boards as well, the gate opens and closes more, etc...
Bottomest line, I suspect, is that because there are fewer other locations that allow it, they'll charge all the market can bear.