Wasting your time with s1 bud, to make about £100 a week you will need about 8-10TH,or about 60-70 s1 units lol even using more modern machines to get to about 10TH you might need to upgrade your power supply and the building will definitely need modifications for cooling.
Cooling is OK there its freezing there lol .. but i no where you are coming from .. that's why I wanna start on a cheap on see how it all works ..