Not really. You generally want to use a mooring instead of an anchor. A mooring is a permanently installed anchor with a chain attached to it and a buoy on the surface. You drive your boat up and tie to the buoy. The mooring is generally rented by a marina or yacht club. The anchor is just not secure enough to leave your boat unattended on. I leave my boat on a mooring through hurricanes.

You also need to be able to get on and off your boat, so having a dock to tie up a little dinghy or having a launch (kind of like a water taxi) is key, and marinas/yacht clubs will have those facilities.

I pay around $800 a year for my mooring rental and having the gear pulled off it and inspected annually, and launch service is included. It is far cheaper than a dock.

Some other practical limitations, if you aren't at a dock you need a generator running for power. If you aren't at a dock I really have no idea how you get internet.

But, having lived on a boat in the past I would absolutely love to do it for work in the future.

Hmm, okay that makes sense. $800/yr (if that is what he is paying) sounds totally worth it. Looking around a bit on google (daydreaming) it looks like it could cost anywhere from $1000-2000/yr depending on the size of the boat.

Internet would be pretty easy to solve, 500ft out isn't that far at all for a PTP wifi link (although the boat moving around might cause some problems with that if you're doing directional stuff). There's also 3G stuff although I once had to spend a couple of weeks working over my AT&T 3g modem and it was almost completely worthless...

/someday

In London you have to rent a place for your boat.