When I got my first SUP I picked up a pair of "SUPwheels" (
www.supwheels.com/SUP_Carrier.html) which seemed like a good approach for the 500m or so from the front door to the beach. Alas after 2 uses the axle broke which the manufacturer put down to a bad batch... which they said they knew about but they had thought they had solved the issue before any got out the door??? ... and to boot the bent/broken wheel damaged my new board where it rubbed which I am not the least bit happy about!

Assuming the SUPwheels were "not faulty" the main issue I had with them was that they carried the board ok but there was no convenient way to pull the board. Some sort of easy handle would be great. I tried rigging something up with some rope which "had potential" but it was not as straight forward as I anticipated it would be.
Wheels on the board can be pushed or pulled until you get to the sand but once you hit the sand you have to pull and with nothing to hold on to it is probably easier to carry the board and the wheels separately.
So what is the answer?
What about some sort of shoulder harness/sling so you are not trying to hold the weight of the board with your hand continuously. If the answer is some sort of wheeled arrangement how should it be configured/set up?
I am not without skills when it comes to making stuff and there are lots of buggy type dodads out there so design suggestions will be happily taken on board.
Ladies and Gentlemen - your thoughts please!