Yes....it....is!
And becoming a bigger bitch as it's growing. The 90 footer obviously was put up with equipment. This 47 foot has become a massive burden erecting by ones self.
But, drill pipe is very stable if constructed properly. The hard part is welding magnetized pipe. There are tricks, but sometimes the magnetic polarity of the pipe suddenly swap and weld gets real silly.
My little 37 foot has a break at 17 feet, it's only 2-3/8" diameter all the way up to 30 foot. Then bushed to a 1" diameter pipe. Looks like shit, but handles wind well. Only 7 to 8 foot is driven into ground, no concrete. 4 guys at 16 foot made out of coated 1/8" cable, tightened with ratchet straps. Looks shitty, but works.