240K? How big is this build? It must be HUGE.
Thinking about windows - upvc need little attention, maybe there is a company that makes upvc windows out of recycled upvc?
You will have a lot of windows - any wood will need taking care of - i think about the energy needed to make the brushes to protect the wood, the energy used for the little man to come and maintain the windows, the energy used in producing the varnish or whatever you use on the wood - the trees that were cut down.
Do you have to buy the land that this build is going on?
See i can see that solar power will cost you money but the money it will save - a turbine would be better maybe - grants can be had on big turbines but PP is needed.
Hmm i am right in thinking nursery as in children and not plants - i didn't read that far back in the thread.
Are you going to be making your own paint and dough etc? Does the 240K include equipment and materials?
Do you have a client base lined up already? Would they all be specifically interested in your flooring? It has to be practical i know but could you not have a variety of flooring throughout? Recycling is a huge aspect to keep in mind and i bet you could get some lovely flooring from various places.
I am just thinking that it might be wise to have the expensive things that you really want but cut back in other areas - i agree reclaimed everything. A piece of flooring does not need to be in one piece - flooring isn't a big issue - ok you want it to look nice but the Basics - heating, light and power are the most important aspects and i think need to be right from the start.
You will need to make enough to make a profit so you need stuff that will save you money - self sufficiency has to be a huge wow factor - i'd rather walk into a nursery with a turbine than one with a lovely natural floor - i'd rather see mixed fabrics from the charity shop than brand new textiles.
I'd rather see re- used equipment than brand spanking new.
I'd rather the materials be environmentally friendly and the structure of the day be holistic more than what lino there was on the flor.
Maybe you need to do some market research to see what is important to a potential client rather than what feel simportant to you right now.
good luck - i am jealous.