If the tires were filled I think it would be around 4500#. I opted for wheel weights which are still on order. The trailer is around 2400#. It towed pretty easily by my 3/4 ton Chevy Suburban.
According to the specs the backhoe has a 7 1/2 foot digging depth. I haven't tested the digging depth out yet but I have been testing the digging strength by removing some stumps in my yard. So far I am quite happy with the stregth of the hoe.