To: DocCJ in North Carolina
Lots of information in your answer.
Sounds like a great setup
A little confusing though with so much info.
I used to have a 30'x 16' garden (pre kids ('93), pre divorce '10) with every veggie organic and growing 8' on all types DIY trellses...
Now in 3rd rental and having to improvise. I have a 2-3' deep growing space along the back brick wall of the rental house,and have to avoid all plumbing and electrical lines coming from the house. So a raised bed is really the only solution.
There is a HUGE yard but the animals will eat anything and everything (home all surrounded by woods and creek). There is an old raised bed in the yard though it is full of weeds, unlevel, and the wood sides appear rotten so it's really unusable. Due to current health I'm no longer able to get out and prepare (haul dirt, till ground, build trellises, etc) nor maintain a big space.
So a raised bed is really the only solution, and multi-levels seem appropriate for the space. The back wall of this rental house is on the South side at the patio, so the area receives full sun nearly all day (until 3pm or so when shadowed by sun moving to the left side of a screened porch).
Could you possible upload pictures of your garden setup?