Hi there,
This is Bogdan from Romania.
I'm a mechanical engineer - specialized in the industrial robotic field, 3D designer and modeler (from time to time and some projects I could make the functional prototype too).
I'm doing product design, industrial design, reverse engineering, ideation, etc.
I have over 15 years experience working on various systems/devices across multiple industries, from concept to launch.
1 - seen the sketch you've attached - need some more dimensions
2 - how would you like the top washers to be placed? (on the bottom ones, or racked? - i'm recommending a kinda attachable racks for these washers)
3 - the shed will be designed as a modular system where you'll have the poles, the roof beams and everything included for manufacturing. i recommend adjusting the external dimensions to fit as much as possible to the standard lengths of rectangular profiles and aluminum sandwich boards, in order to have minimum lose of raw materials... (if the extra space which will result will not be an issue)
4 - alongside with the 3d model and shopdrawings i will provide bom list and where possible links to the supplier (need to know which one will be more convenient for you)
5 - except for the air vents, water inlet/outlet and power, do you need any other utility? (heating, AC, etc)
6 - the door should feature a locking system?
7 - best method for the electrical power installation is to have all the parts/components on the wall mounted for easier work...
Regards
Bogdan