There are dozens and dozens of threads on here describing your exact problem along with the options.  A search for "shop internet" or "wifi extender" or "Ubiquiti" or "Point to point" will get you started.

I've installed many point to point systems and mesh wifi systems.  Personally, I'm not a fan of trying to distribute wifi all over the farm yard because it creates issues when you leave the yard!  Mobile devices have very weak wifi radios.  They will see a network and connect to it but often not be able to send packets back to the network so while it looks like it has a connection it is only one way.  Learn how to install a set of radios for a point-to-point connection and then install an access point in your shop or hire a local person to do it for you.