Just go with professioinals like giga watt

https://giga-watt.com/

https://www.gigawatt.sg/shop/?_ga=2.208565595.853030196.1514892513-1326677965.1514892513

They have GPU miners and working on a massive motherboard that will allow you to just send them your GPU and they'll plug it in. No ETA on that but you won't be able to out compete them and difficulty will either continually rise until electricity is a major factor in your profits or prices will plummet and only the most efficient will survive which has happened ever other market crash and Ebay gets flooded with dirt cheap GPU's and not enough gamers to buy them all at same time so think long and hard before investing "multi millions" into a mining farm. Start small or go with the pros if you are going to invest serious money.