This machine is heavy duty. This is the size we started out with. Great size for small worm farmer. We have harvested up to 10 lbs of worms per hour with this model depending on wetness of materials. But, small enough to be loaded and carried in your 8' pickup. Easily rolled around your bins or windrows. With the pneumatic ballon tires on all four legs, it is easy to roll on hard or soft surfaces. (ground or concrete). Wheels can be turn 90 degrees to allow machine to roll sideways. Inventory is in central Mississippi. With two screens, you can have two size mesh screens. Shipping is buyer's responsibility. We do not crate. Can be picked up in West Central Mississippi. We have one medium harvesters instock in Olympia, Washington for immediate pickup. Shipping charges $350. from Mississippi will need to be added to the price of the harvester in Olympia, WA. We can help arrange delivery nationwide.