What's the Best way to dismantle aluminum semi trailer?

I have done a few and finally found a good cheap way to do it without major equipment. I did have access to air but electric should do it as well. I use a 4 and 1/2 inch grinder with a Dewalt 1/8 cutting/grinding wheel, I ground off the rivet heads and punched the pins through. The sheets came apart nicely and it went quicker than expected. I carefully took the corner sections ( the radius's) apart and sold them for $250 each..the are often damaged and easily sold. Cutting aluminum is always a hassle and hard on blades.