comments:
There are many point-to-point wireless network bridges built for this purpose, besides unifi, which are cheaper, for example tp-link. Unifi is great, but expensive. But, as others have said, running a buried fiber or cat6 ethernet cable is definitely your best option, and really not as difficult as it may sound. Probably no harder than installing a point to point transmitter and receiver on the respective roofs and getting them wired to your network. There’s really nothing better than a direct wired connection. 150ft is well within the range of a cat6 cable. Rerouting your ISP fiber line to the house just exchanges one problem for another: you will have good connectivity in the house, but no way to get it to the pole barn (unless you are paying for a second account connected there, which is expensive and unnecessary).