I guess it looks easy to make....
Everything looks easy to make, and most stuff is. It's a matter of whether or not you have the skill and more importantly - the equipment.
Sometimes the cost of the equipment required to make something that looks easy to make can be very expensive - maybe not too bad in the case of this particular table, but equipment, skill and time are required.
Take aluminum weldments, for example. If you have no skill and no equipment, you will spend at least $6 Grand and several months of spending countless hours and dollars before you can even think about welding even the simplest structure together. And that is providing you have the power capability to operate the equipment. Things get expensive very rapidly.
Looks can be deceiving.
Scott