Greetings from Texas

Hello All, I wanted to take a moment to introduce myself. My name is Scott and I've been working with heavy equipment since 1981. I currently own an air conditioning company/alternative energy company in N TX. In the past I owned an excavation company mainly concentrating on utility construction and septic systems. I'm back in the equipment operations arena so that I can have more control on my installation of geothermal HVAC systems and want to receive feedback from others on equipment cost of operation/dependability issues/maintenance. I also brew my own biodiesel fuel for use in my equipment. If any members want information on solar/geothermal/biodiesel I'd be glad to share my experiences.