Potting/garden shed ideas and luxuries

So I am about a week away from starting my potting shed, and I am seeking advice on any design ideas that would be good to incorporate. This building will serve as kind of the hub for garden and orchard activities. We run a very large garden approximately 1 acre for personal use, as well as at least 1/2 acre of flowers for making market bouquets this year. So far, here are the things I've incorporated into the design.

1. lean to on outside to store hand tools on wall, and powered equipment (gasp) out of the rain.
2.The ground outside the back will be approximately 3 feet higher than the floor, and this is where a few 300 gallon ibc totes will sit to be filled by rain gutters, as well as my 250 gallon compost tea system.
3. There will be ample work benches as well as storage tote racks built inside on one end.
4. gravel floor
5. stainless steel 2 bay sink with side drying counters
6. Mounted fans

I'm seeking any other cool or handy things that can be incorporated into the actual design of the building itself. A greenhouse will probably be one of the next things behind this building at least a month away from now. The building is solar powered and only has rain water or water from my pond by way of water wagon for the time being.

Regarding the door, you might consider an  awning ( assuming the lean to does not address this), a small deck, and, if you build the door ....a somewhat wider than normal door that would be a fit  for a garden cart, wheelbarrow, etc.  Also, however big you were going to build the shed, build it 2 ft bigger.

I'm puzzled by the gravel floor - I would have thought this could make it mucky underfoot? If you are potting on, washing and cutting up plants there will be debris (or there would be if I were helping ). Either an earthen floor that could be shovelled out or a hard surface that could be swept might be easier.

I'm wondering about storage and access to potting compost and ingredients thereof.

I'm assuming that you made a list of all the jobs you want to do undercover there and the tools and materials you will need. Think about the workflow and where things will come from and go to.

I used my potting shed in my old house as a propagation area - there was a window on one side that I could put plants near as they were growing on. I had to move them in and out of the shed to harden them off and acclimatise them to outside. Maybe a hatch through the window would have been more ergonomic than carrying trays through the door.

I just walked into my own 8 X 16 potting shed.  I noticed the light went on as I walked in.   It has a solar light. Also it has three SW  facing windows….my only option due to location.

I chose the gravel floor base about 4 inches thick to keep it from being mucky under foot. The sink will drain out into the garden area with a pipe, but other watering will just fall on the gravel. My soil holds water like it wants to be a pond due to the extremely high clay content (i live very near to the pottery capitol of the US, and it became that because of the massive amounts and varieties of clay in the area). There are windows on the long back side and the end opposite of the lean to. As far as potting and compost components, I have one compost pile that is within about 20 yards of the building, but the larger piles, as well as my vermicomposting bins are further. I plan to move them closer in the future, but they are currently under shelter in an old pole barn, so i'll have to haul that stuff closer as needed, but I did plan room for 3 55 gallon barrels to sit in the shed. One for finished compost/soil mix, one for plant and veggie material to go to the compost, and one for ground biochar so it's available while potting. Keep the ideas coming!

do you have an outdoor sink setup? i don't have a shed, my space is small and my improvements have to be in the garden itself, but having an in-garden water source (rain barrel with tap) where I can wash veggies or composty hands or whatever is such a lovely luxury, i don't know how I lived without it. when i've got 50kg of daikon or carrots i just pulled it's so nice to be out scrubbing them on the ground instead of hauling hoses or bringing them up to the sink. of course, i have clay like yours, so the runoff needs to be routed elsewhere (also using gravel in my case).
I also have hanging spaces for my best garden tools, and woe to the person who takes a tool and doesn't put it back where it belongs.