I dont know if anyone does tbh, but if i was hiring mine I would want at least £30 a day and I imagine anyone else would want around that figure + deposit. so you want to rent 60ft pole x2 for 6 days = 12 days @£30 which=£360 spent on hiring over the year. You are better off buying one mate.
Is it possible to use one 60ft pole to do the high stuff with someone on a 40ft or whatever you have following on the lower stuff?