In most cases local, smaller businesses are less expensive then larger city based businesses that have higher overhead costs.
City based businesses may even charge additional traveling fees to come to the valley.

A local business can better serve you just because they are close by and tend to have fewer clients than large businesses.
Because of this each client tends to get more attention and better service.

This has a snow balling effect as local businesses will then use other local businesses and your money is reinvested in the area helping many people.

A Local business will generate greater tax revenue which means improved services for all of us.

Less travel means less vehicles on the road and this means less emissions and pollution.

And that is just a nice thing to do. Wouldn't you help your neighbor if he or she needed you? This is an ideal way to do just that.
You may even want to start a business of your own some time and then you to will need the support of your community.