If your work destroys boots like y last two jobs do just buy cheap Walmart ones no point of buying expensive boots just to shred them. When I was roofing the hot tar melted my boots and now I build fiberglass train parts so the glass coats the boots.
Now on the subject of comfortable army boots you can beat the Nikes. Light weight, comfy, no break in time, wicks moisture. Also the tactical research makes an awesome boot. Then there are the danners, bellville and other standard issue boots. I wear my Nikes or TR boots most the time my Nikes are about toast though need new souls they look like racing slick tires now ive put so many mile on them being a "light" infantryman we walk everywhere.