I can help with some of those questions.
Shipping weight is around 150 pounds.
You could do half blocking on it, though it will be much slower than using a large Bridgeport mill. I have completed some pretty heavy cuts on mine. You will need to be careful, as some of these units used plastic gears in the head, and excessively heavy cuts can break them. Mine were broken running a 3" shell mill, which is far outside the specifications for this machine.