ok, well. So you need to find a plant. a seed something. Do this while you plan. you have plenty of time and 1-2 plants wont need a ton of room setup. Get the plant(s) and grow moms. you might want 1-2 of them. they can grow under t-5 florescent lights you can buy at home depot. get some top end potting soil, happy frog and ocean forest if available. mix 50/50. you will only have to water the mothers for a couple months with that mix. put the mothers in 5g pots for now.

so to start up the mothers.

fans to keep air moving
2-3 5 g pots
soil
t-5 light
hangers for the lights.

This will take 1-2 months and you will have a plant supply. Not much heat from a t5 so no need for anything other than them at this point.

now you have some mother plants while they grow time to setup a space.

Next question.

is this a open system or closed? will it run on exhaust leaving the room to get rid of heat or will it have a/c?