Start off with 1 tent and get another one as you need, What you think you need/want right now might not aline with how you think after the first few grows. Better start small.
And you will also need extractor fans, circulating fans, timers and maybe some irrigation setup and so on. it's a lot of different parts and expensive to change if you get it wrong.
I Feel your excitement but don't think growing cannabis is a fast process. it will take you 3-5 months before you have the first harvest to smoke. Do yourself a favour and budget in to buy something to smoke while you are growing so you don't do foolish mistakes and stress true the first grow.
Take your time. Run Photos and keep a journal
I did bought most of the grow stuff already so I will post pics when all is setup.