I thought I would chime in with my cell antenna/amplifier system setup, my antenna and mounting system, and cable routing from the antenna to the amplifier.
I built a 20 foot telescoping mast from 2 10 foot pieces of 2 diameters of metal conduit found at Home Depot. I wrapped the inside piece with some Gorilla tape at each end to tighten the fit between the 2 pipes. I drilled a hole through both pipes near the top end of the outside pipe and through the 9 foot inner extended pipe. I put a machine screw through this hole when the pipes are telescoped out to its full length. The vertical Yagi antenna is connected to the inner pipe. There are 2 holes (1/4" ?) at right angles drilled near the bottom of the outside pipe. Yes, these pipes flex some erecting them and in the wind, but it has held up so far. I can stow the collapsed mast on the floor in my bedroom between the pulled-in bedroom slide and the dresser. The antenna ends up sitting on my interior steps. When at sites where the antenna/amplifier is not needed, I simply place the mast/antenna outside leaning on the main slide nearest the door.
I mount this mast to either my closed awning arm or to the ends of slideouts with 3 inch (?) C clamps. 1 C clamp is specially modified to act as the mast base support with a right angle hole drilled in its base arm, and a #8 x 2" machine screw and nut assembled into it. Also when I mount on the awning arm, I use a large (6"?) hose clamp as an upper restraint. On the awning using a stepladder I can lift the 20 foot mast and antenna leaning against the roof vertically enough to get the bottom of the mast over the machine screw on the bottom C clamp mounted near the bottom of the awning arm. I then hold the section to the awning arm about 4 feet above the lower clamp and thread and tighten the hose clamp to secure the mast.
For outside slide lip mounting, I use the same bottom C clamp with the vertical machine screw, and use other C clamps with small wood block interfaces for clamping a round tubing to a flat surface with a smaller C clamp.
For aiming this antenna /mast setup, I use a #1 Phillips screwdriver through the holes in the base of the outer tubing to act as a lever in rotating the mast/antenna.
I bring the coax through the bottom of a window/screen with a small rolled-up rag as a gasket. Lots of rain isn't a big problem here in Southern California. I do the same with my full-time satellite dish on tripod outside antenna coax.
I have a Wilson 4G 4 band mobile cellular amplifier inside. This setup has taken me from 0-1 bars on my ATT IPhone XR to 4-5 bars.