Awesome input, people.
R Scott, I thought about stock tanks. I've seen many of these at ag shows. I will certainly consider that for one or two of them. I like your idea of a mesh bottom.
Dan Boone, I was thinking the same thing ... these tires have been out in the weather for more than 40 years so I am guessing any off gassing or leaching has largely taken place.
Danielle Venegas, I was going to use a reciprocating saw or angle grinder to make the job of cutting the sidewall off easier. The sidewall on these babies are at least triple the thickness of a car or truck tire. I think a power tool here is a must.
As they are, it will require a good sized
tractor just to pull them out of the ground where they've been for 40 years. Yet another fun spring
project ahead of me!
Thanks all.