A lot of variables out there.  A lot depends on the volume you would like to produce as well as the product you wish to separate.  Mine is a glass “mad scientist” 2 liter type but it takes forever to produce even an ounce of essential oil.  I would suggest modifying your post to include the material and amount of oil you wish to produce in what period of time.  I would also take time to figure that out before you make the post so you get the best help.  Also Indoor processing or Outdoor?

Best wishes.