I can some old school thinking.... with 110v terminology. Most of us have 120v-125v, even me out in the sticks

Some thoughts that cross my mind....
Seems like 2-1/2 inch PVC is a bit overkill for LMR-600. Maybe, in the same trench, something more like 1-1/2 for the LMR-600, and 3/4 for the wiring.
For that matter, you didn't specify the frequency ranges you'll be using, and for HF LMR-600 is just not needed for the length you're using. For UHF, there's only 1dB difference at 100' between LMR-400 and LMR-600 at 450mHz.
I'm curious if you'll be transitioning to more flexible cable for the tower itself. LMR-600, even the UltraFlex is pretty stout and doesn't bend all that easily. And of course, watch you're bend radii on the runs and transitions.
No affiliation, but I strongly suggest the use of the Times "EZ" connectors for that LMR-600, and also using Type-N instead of PL-259/SO-239 "UHF" connectors, just for the weather sealing of the connector if nothing else (price is the same for either type by the way).
Although the conduit is "supposed" to be dry inside... it usually isn't. You might want to consider the "DB" variety. For that matter type UF for the 120v power.