Stihl TS420 concrete cut off saw which accepts 14″ blade. These saws have water attachment point that you can hook your garden hose up to to control dust. Rent a diamond blade for cutting concrete or buy blades for your specific use. Sometimes it makes sense to buy your own diamond blade if you have many days use for the saw.
Gas Cut-Off Saw
14″ Blade
$45.00 – $900.00