Well the maximum $ per day would be 5x GTX 1080 Ti with a power limit around 60% so that they only use ~150-155 watts each (may vary from GPU to GPU). Theoretically you could manage 6 at 150 watts but that is more then I would do personally. What PSU do you have?
dont have a PSU at the moment, want to check first what kind of rig i want to build. so maybe 5x 1080ti and 1x 1060 6gb should run easy?