Roughly speaking you will need a 7 figure investment to make it happen.. The money and qualified resources to deliver are the hardest things to find..
with good people and knowledge of the industry you could probably get away with mid to high 6 figures (assuming you already build some sort of electronics somewhere)
but no to op, you can not build your own amazing mining machines for a few bucks. that being said i hope by late summer you should be able to buy the chip tapes in small numbers on the open market (it will be too late then for profit).