If any portion of the cabling is going to end up running under concrete / pavers / etc, do yourself a favor and run it in conduit. You don't want to be pulling up laid materials to replace wiring if ...

I wave a 1" conduit running about 500' to asome outbuildings, and we are looking at running about 60a service down there from the house. I was hoping to run some fiber alongside (single mode, maybe 6 ...