I was also concerned about the weight on the end of the wall connector. Thus the reason for the two wooden blocks placed under each end of the regulator. The pipe segment is clamped down to these two blocks. One under the check valve - PEX fitting and another against the wall. The clamp near the wall is just out of sight in this photo, but some foam rubber padding is seen. The entire assembly is well supported.
As for the pressure valve I had installed one a year ago to monitor both city water and pump pressure. I installed a PEX T where the pump outflow line joins the city water feed and then ran some PEX to the desired mounting location. I placed this gauge high in the basement near the EMS protection monitor. This way I can check all shore connection readings quickly in place. Because some pipe routing issues I placed another T and a drain valve and hose under the gauge for winterization. Below the EMS monitor is a list of the EMS error codes.
I didn't care to install an internal gauge for incoming water pressure, since I carry a portable unit and attach it to the campgrounds hose bib before connecting. However, with this setup I will only care if the city water pressure is low. In which case I'll supplement it with the pump.