Probably the best I've used are those powerline bridges. WiFi is too finicky at over 100 feet so we'll ignore any wireless solution. 300 foot ethernet is always cheap and solid. Some will not consider such but since it's good for 100 meters without issue, and wire is cheap, we'll run wire every time.
My brothers house is about 300 feet from a barn [ garage and work shop ] with a place I stay. We would like to have internet access from the barn. I have to take my computer to his house for internet service.
What would be the best method [ service wise ] and most economical to obtain the described results?