Thanks everyone for the suggestions, especially mentions of nutribullet. I was an early adopter and just couldn’t get on with it.
My ordinary, cheap blenders which will do 1.5l of soup suit me much better.
Turmeric needs no special treatment other than a good long blend. It goes in whole (no peeling and no faffing with a grater and no orange all over the kitchen) at the bottom of the blender alongside the blades.
In the end, I bought another cheap blender when I was in Carrefour yesterday. Not a brand I recognise (but quite frankly branding these days is no guarantee of quality and may just add expense), has 5 speed settings, which is useful. I may live to regret it - we’ll see. 