There are so many very nice looking and different designs for AP that we have seen on this forum.
They are located in so many diverse areas (basements, backyards, condos, garages, greenhouses, etc.....)
For those who have now built a system and are reaping the benefits (good eats ) what would be Your specific Top 3 bits of advice, based on your experience, that you would offer someone just starting out or thinking about starting AP...