Most cost effective source for residential wire and conduit?

Direct Bury ethernet cable can go house to house, Cat 6.

Max distance on that is 325' then it needs to run through a switch and boosted again for the next 325' and so on.

I have that Direct Bury Cat 6 from my house to the shop, but it is only 100 ft. Works Great, going from router in house to wifi router in shop.

Just for the fun of it, ran it through a switch in the shop and out again to some more direct bury Cat 6 for another 150 ft run to the next out storage building.

Have 100 Mps Fiber Optic service here, so there is plenty of push to do the distance.