vouch isnt the right word.
love is a better word.
“if you love something, you’re more likely to do it, and if you’re more likely to do it, it will be more likely to produce a result.”

kind of thing 

 vouch would have been strong enough for me, so love is a sure thing

I don't actually own kettlebells, have used them at friends houses

should I get an adjustable set like this or just pure

https://repfitness.com/products/adjustable-kettlebells?variant=41067595661470 

 i would be happy with one 20kg bell, and a tractor tire. 

 fair enough, I'll look for simple used ones on marketplace