Some good advise to start you off although I would start saving the pennies, very much doubt you will be able to produce a machine of that size on your current budget, cost of supported rails, 1610 ballscrews + blocks & bearings will cost half of that if not more. Electronics won't be to far away from the other half. Doesn't leave anything for the frame itself & other bits you will need like pulleys & belts or couplings depending which road you go down. On top of that you will need some sort of software to run it all & although you can get some reasonable free software it will depend on how much time you have to spare to learn how to use it. If this is going to be a production machine you can't really afford to scrimp on anything so I would look to double your current budget & if you have money left at the end then it's a bonus & you can treat yourself.