the place i work just bought their second water cutting table. the main table was made by jet edge its a 4 head unit, and the table is some where in the ball park of 6 feet wide by 14 feet long. we cut just about every thing on it as well. from wood to plastic to fire resistant fiber glass. the second table is made by omax and its just a little single head table with a total travel of 26 inches in both directions. as for the z axis its a must, if the head it to high above the part it wont cut the part very nice. and if the sheet isnt even or you need to clear an object you can lift the heads up. as for price i have no idea what one of these machine would cost. but they are worth the money.