Home DIY

I think it was @citygent who had an amazing pulley-based bike storage system.

Looks like you'll need very wide arms.

This could solve your other problem too, small child as a counterweight.

Long lifting straps on the bottom of the board, that extend up into the loft, lifting from the loft with someone stabilising the bottom. You could rig steps to rest the board on as you lift, so it's not all in a oner.