Masonry eats boots so no sense going crazy expensive, but you also don't want to go crazy cheap. You can look at keen moctoe's (with a steel toe) in the $150-200 range that will be super comfortable and good quality, they will fail a little sooner than a nice pair of thoroughgood, but in this line of work everything will fail, and the keens will at least be immediately comfortable and not need a break in.