In this video, I assemble a Yardistry model YM12842 / Meridian greenhouse that was purchased from Costco. Added electrical, water, lights, exhaust fan, exhaust fan controller. I am considering adding small water tank for thermal mass and adding solar components. I did not keep exact time of the build. Here are the estimates:
Base/Foundation 8 hours
Greenhouse 16 hours
Lights/fan/vent/misc 8 hours
Conduit/trench/electrical 8 hours
Gravel/Weedmat/Edging No clue :)

Yardistry link:
https://yardistrystructures.com/67x...

Items used in this video can be purchased from Amazon. All items in this video were personally purchased. As an Amazon Associate I earn from qualifying purchases.

Wire Shelf: https://amzn.to/45q3QYV
Replacement Automatic Roof Vent Opener: https://amzn.to/47MDVw3
Fan Controller: https://amzn.to/3ORuxP1
Fan: https://amzn.to/3YQ4mNi
Edging Kit: https://amzn.to/3L35VBJ
Internal Lights: https://amzn.to/3QYSaYM
Weed Mat: https://amzn.to/3QSLStB
External Lamp: https://amzn.to/3PdD9ke
Inuse Outlet Cover: https://amzn.to/3YW3hDM