Regarding using

... [through-the-wall] PVC pipe with a downward-pointing elbow
on the outside end [for running cables into the house]....

I should add that, after threading coax cables through the pipe, I stuff
either fiberglas or steel wool into any left-over holes between/around
the cables in the pipe to keep critters out and heat in.
--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)