Smart Bro Wireless modem vs Wifi Range Extender

I have recently purchased a USB Network Interface Adapter trying to make it work with my neighbor's wifi hot spot. I'm always mobile so, applying for a dsl subscription is not a good idea. I am working with my pc at home inside a cave to be more specific, I have some trouble connecting to the hotspot which is right beside our house. What is the range of a typical wifi hotspot?

Google is my friend, instead of giving me the range, i found a wifi range extender instead. It's so creative with just the following items needed:
1 - Metal Strainer/Steamer
1 - USB WIFI Adaptor
1 - USB Extension Cable (I chose a 10ft long)
½" Drill Bit (I like to use stepper bits for metal)
Gorilla Glue (Epoxy works well too)
2 - Zip Ties

I am tempted and I'm sure I'm going to miss our home strainer. Not sure if it's going to work inside a cave. I tried searching some more and found Smart bros latest wireless modem. It's very tempting, based on the operator's messages, as long as there is a signal from your phone; the modem should work! I have changed my mind ill try the modem first and later, if its not going to work; ill experiment on the strainer.