Living on $14k is certainly possible, and the usual suspects can be cut to save some cash:
* Drop cable TV
* Same for cell phone - keep one pre-pay for emergency and use Skype for business/personal
* Stick to one car if at all possible (easier if someone can work from home or has flexible work hours). Negotiate lower insurance rates if possible.
* Don't eat out
* If internet is essential, go for the cheapest package available.
There are usually offers for new internet customers that give low rates for the first year. However, when your year expires you can call them up and ask to be put on a new special. This worked for my wife and I when our rates went up, and we got upgraded to a faster connection to boot.
That's really the biggest money saving tip of all - ask politely. It doesn't always work, but you lose nothing and can gain some decent savings over time.