+1 on the kick wheel, I have a pergola as my wood supply, plenty of good wood shows up in gumtree amazingly cheap.
I'm planning on sandwiching bricks between the two boards(discs) over one concrete slab for the base weight. Should be easy to disassemble and relocate if needed.
Lots of people sharing good ideas on youtube, also mentions which bearing types you need...
https://www.youtube.com/watch?v=iJEr1M9QGGc
Ps. If the weather ever cracks 17degrees again I can restart my blank...