We want to hire a taxi from the Cusco airport to the SV. Our hotel would charge us $50. A local guide with whom I've been in touch has offered a driver for $50 and his guiding services for another $50. This seems rather steep. I know that we can find taxis at the airport to take us to Pisac (which is where we want to stop for a little while before heading to Urubamba). I've also heard that local guides are availabale outside of the ruins at Pisac. Should we try to wing it on our own? What's reasonable?