If your "all vegan, healing center" will be a commercial enterprise I think I'd be looking to buy property a lot further south, so that you could dependably supply your need for home-grown produce on a larger scale.
The short growing season in Colorado might make your healing center a summer into fall experience only, I fear. Carrying it through the other seasons would necessitate buying organic produce.
Southern California, the Gulf Coast and Florida are about your only options if you want to grow fresh produce all year 'round and live in the USA.
