It really depends on the size of the mine. You can run up to (maybe) 20 S9 units in any rental which has the usual ~50KW connected. Original wiring probably won't be able to handle even this fairly small load. The Electric company could get mad too if that transformer is shared and you pull 80% of the capacity 24H...
You need to check with the local electric company if more power is available. Than pay for it (XX-XXXK USD). Than pay for the new inside wiring and breakers about the same. Than comes the cold and/or the hot temperature problem depending where you are (cooling).
If all solved you just have to order the miners