Thank you all so much for the comments. I really appreciate this!
Kelly_Zak, I've been keeping an eye on your work over on another site and I am humbled by your comments. You are really talented and maybe someday I'll build a scene such as you. Thank you!
As far as anyone wanting to get into this field, I'll try to explain as best I can how I came to do this type of modeling.
As a kid of 10, I started to build plastic models of aircraft and cars. Having a strong liking for motor veihicles of all kinds really helped. My father was a technical illustrator for a rocket engine manufacturer and helped inspire me to take up drafting. I went through junior high, high school and two years of junior college taking all kinds of drafting, illustraion, rendering and architectural classes but I was never enthusiastic about math. I saw some models of propulsion systems at Aerojet General and my father encouraged me to try this type of modeling. I never gave it much thought.
Years later, I owned a radio control hobby shop and met some modelers who built architectural models for a business. After I closed my shop, I went to work with a guy and it took off from there. I have had no formal education in building models, it just comes to me. Being able to read blueprints, elevation drawings and site plans is essential to doing this kind of work.
Do I have any recommendations for someone wanting to enter this field? Practice as much as you can the techniques needed for building clean models, and take as many art, auto cad, drafting, architectural classes as possible. Then practice some more and look for a company that does this type of work and ask for a job.
Good luck!