If you do it yourself, you have to buy some hardware (antenna, cable, router).
If you have it done, you'll have to pay for the work also.
I have a wifi signal from my house that reaches my metal shop when standing in the open door, but with the door closed, absolutely no signal.
Is there an inexpensive way to put a receiver/antenna/??? mounted to the outside of my metal building with a line running inside to extend my wifi into the building??