So I went and bought those kettlebells I earlier asked about.
I now have 12kg, 24kg, 32kg, 40kg, (one of each) which I bought for $150 in total.
Unfortunately there were no doubles available, but doesn't matter, I'm pleased with what I did get.
Now I just need to find a kettlebell workout that hubby and I can do! Any pointers on where to look or what to do?