Ok so i am still back in the days of wagons and horses but rf etc aint all its cracked up to be inmho.
So....i have a real cheap solution for you if you like.
Go old school. Get the router from Jim...thats free right....then check out your phone cable to the shop.
There are more strands in that cable than what are needed or used for telephone.
When the networks are hardwired they use category 5 and up cable but again there are way more wires in those cables than what is need for a straight forward link.
Sooooo if you gave a multicore telephone connection to shop then consider taking out the spares and hardwiring the "Jim" router to a spare port on the house router. Given house router is wifi there is bound to be spare network port at rear.
My old school solid connection will not be able to be hacked ...yeah call me cold war paranoia. nut...and will work like a blast and best of all is gonna cost you two rj45 connectors which if you wanna do this i would happily crimp onto some wire and send you free so all you need to do is then splice the end tails from each rj45
to the phone line spares at each end.
Now you cannot get more free than that or more solid.
The only issue you have is how many spare wires in that phone cable. If there aint enough you could always get some cat 5 and run a new line and in one cat 5 cable you could get your phone and modem to work and have spare.
In my case i ran an entire spare conduit to my shop at time of building it has cat 3 cat 5 and co ax for cable. call me nuts but the boy scout motto is "be prepared"
Let us know what you wanna do Rex i can help you work through them wires.
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