Placing a wireless router at the top of the tower is not a solution. I am
assuming of course that the OP wants to connect to other wireless routers. I
wanted to do something like this and all the computer tech people I asked
said wireless routers dont talk to each other wirelessly.
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Correct ! and because of that you would need a wireless bridge
operating on a different RF channel than the wireless router which
'senses the neighbourhood'. To prevent clashes the wireless bridge
should operate on a channel not used by the other wireless router.
All of this refers to standard consumer type of routers.

Whatever , a single router connected by cat5 cable to the monitoring PC
indoors seems to be the most cost effective solution.
Cat5 can be laid underground when run in plastic water pipe ,together
with the power supply wiring for the router.

For the past 16 years our satellite dish is located away from the house.
Its 75 Ohms coax runs through 20mm OD polyethylene water pipe (blue
colour , as is nowadays standard in Europe)

Where the cable(s) leave the water pipe ,the pipe opening should point
downwards such that water ingress is prevented. The exits should be
left open to prevent condensation inside the water pipe.
I have never had a problem with any type of cable when run underground
this way.

Frank GM0CSZ / KN6WH