You should buy the land first, then observe the land for AT LEAST a year to see where all the changes occur so that you orient your home just right to take in all the benefits that could possibly come from such a location. I suggest even longer. That is the issue with 99% of the homes built in the last 50 years; they were built with the concept of curb appeal instead of situating them where it was best for the occupants of the house, or the house itself. If the land did not site the house well
enough then... well...just use heavy equipment to reshape where the house sat and make it conform. They got it all wrong!
I would nix the idea too of an architect unless CA laws require it, I know CA has some strange building rules though. If you do that it won't be your house, but there because that is what you are paying them for...to design A HOUSE, you want to build YOUR HOUSE and those can be diametrically opposed things. So if it was me I would design my own home and research, research, research and draw up your own
plans and situate it well on your well observed land. Unfortunately the right way to do things is always the hardest and in this case its waiting. And in this society where we have a "I want it now" mentality it is hard.
Can I back up what I say? I
think so, 25 years ago I started my house and while it will never be done, and I have a lot of things I would do
differently; I started out at 400 square feet and it is now 3500 square feet, built from materials off my farm, and completely paid for. At 42 I am also retired and signed up yesterday to do some farm missions in Moldova.