I think the rain gauge would erroneously tip during the tilt up of the tower. If he unplugged the tipping bucket during the tilt up, it is too high to reach without a ladder to plug it back in.
The tilt up post is a fine way to mount the anemometer up high, but the rain gauge should not be attached to it.
Hmmm. I remember to turn off my console(s) when I do maintenance on the ISS. Isn't that what the book says to do?
And my ISS is mounted on a tilt-up tower. Convenient way to get the anemometer up high and the ISS much lower.
When installing a tilt-up tower, it is wise to orient the tilting axis exactly N-S or E-W, which makes it much easier to get the wind vane mounted correctly.
Oh, and watch out for power wires.