I use Home depot coax, its under 50 bucks for 500 feet.

I put a temporary dish here and just buried the coax, it was a short
term fix that lasted a year till I trimmed a tree, longer than planned.
by a year the cable was bad, water got to it,

run in conduit of plastic pipe, its cheap and no digging needed if it
ever needs replaced.

if you run conduit and keep water out coax will last forever.