we have princess auto here...
i can get 1 1/2 inch bore cylinders with an 24 inch stroke for about 160 each.
some kind of drive motor....not sure what kind of spec you'd need for the quick reactions for the turning...but i'd imagine something not too crazy would be needed...you aren't turning 5000lbs with it.

trial and error right??

so figure another 200 then a pump. for 200 or 300.
you'd need some solenoid or motor controled valves to control the fluid which is probably the most expensive at about 300 a piece.
couple grand and some time could have yourself a decent start anyways.
the other option ive considered is an F-zero AX deluxe cabinet, but not many of those made it out of japan because they were expensive all hell.