High Fruaz and welcome to RUI!
Just getting yourself one of those E-Bay all-in-one grow tent packages will eat up that budget. You'll have everything you need to provide a decent home for plants with lights,(MH and HPS for flowering), exhaust fan with carbon filter with bits and pieces to put it all together, A 600W ballast and lights should come with a 4x4 tent or for you one that's about 120x120x220cm or close to that.
Kits like that are sold with el-cheapo LED lights as well but I guarantee you'll produce twice as much or more with the HID setup.
First thing you have to figure out how you want to grow your plants. All organic with real dirt, organic nutes from a bottle into soilless media like ProMix, hydro nutes in soilless or pure hydro.
The differences between organic and hydro from a medicinal aspect is negligible. Hydro will outperform organic in yield against all but expert organic growers who have spent years honing their skills and perfecting their soil mixes. The big difference between the two is taste and aroma with a wider range of terpenes that may have powers that work in tandem with the cannabinoids.
For seeds the list is endless. I would recommend plants that have equal amounts of THC and CBD. I'm using one like that now in a coconut oil extract I make and it is wonderful compared to ones made with regular pot that have near zero CBD. for patients that are not used to using pot and especially if they don't smoke anything edibles are a lot easier to take and the balanced mix of THC and CBD doesn't overpower them and cause things like anxiety attacks and paranoia that too much THC alone can cause. Easy to make cocobudder or cannabutter for eating and then you get all the medicine in the total plant where smoking or vaping waste most of it. Smoking being at least twice as wasteful as vaping. Vaping is a lot healthier than smoking for those that like to puff.
So much more for you to learn. Browse the forums about grow room design and the various growing methods to get more ideas. A good grow bible is a great asset to not only newbies but me too. I refer to mine all the time for all sorts of things and I've been doing this stuff for decades.
My favourite book is Jorge Cervantes, Marijuana Horticulture, The Indoor/Outdoor Medical Grower's Bible.
Books by Ed Rosenthal are pretty good too but I like Jorge's books better and gave my Rosenthal book to a friend.
Be the best investment you make in your plans if you really use it.
Good Luck!
