The key to me being able to work outside and on the go has been my mifi mobile LTE hotspotthat I bought at the Verizon store in the Metro Center mall here in Phoenix. $50 is a small price to pay for the ultimate in mobility and speed.
I've been able to get speeds comparable to my 15mbps DSL service I have at home in most areas. The battery life is pretty good (about 4.5 hours in actual use). I also was able to get a $50 mail-in rebate that basically got me the device for free. Monthly service for 5gb of data is only $50.
This would be a great addition to your toolbox if you're trying to live the 4HWW lifestyle or just want some extra freedom in where/when you can work on your code. I would also buy this as a gift for any of my techie friends; they'd love having one I'm sure!