I grew up in plant nurseries (mum was a nursery manager) and the key thing I learnt was to make everything easy for yourself. Life gets busy and it’s easy to get behind if you keep putting things off because it’s a mission. For the one I’m building now, I am making sure my potting bench is at a good height for me (I’m short) and I can get easy access to it for dropping off bulk potting mix. Make your bench quite deep so you can load up plenty of potting mix if you don’t have a self filling bench. A rubber mat to stand on makes a lot of difference if you spend a lot of time there. Have enough space so you can load your plants straight onto a trolley or into trays to minimise double handling. Have all your supplies (labels, secateurs, garden diary, moon calendar pens, tape, pots, etc) for doing cuttings, grafting, potting up, and so on within arms reach so you can easily access them from your potting bench. Have a big bin for green waste under the bench so you can keep tidy as you go when doing cuttings and pruning. Have good access ways between propagation house and shade house. If you can, put these close together. My propagation house will have solar powered irrigation system and misters so I know my cuttings and seedlings are staying moist all day while I’m out with the children. Plus a hose for my permanent garden beds. Good ventilation is super important in poly houses. Put in a fan if you need to. If you can, metal nursery benches make for less bending over and are good for ventilation and keeping your poly house and shade houses clean (reduces fungal and pest issues). If I think of anything else I will add it later (my coffee break is over)!