A must have is your own rodi. Even if you do just 5 gallons at a time. Secondly is an ATO. Stability is the biggest factor in success and these are the most important things to achieve that. Not 5k in lights and another 2k in fancy monitors. Without stability you won't be successful. Don't even think for a second that you'll just go down to the lfs and get your water or top off by hand. Life happens and thinking that you can do these things daily is unrealistic.