Thought I'd share as to why, even though I have a tent and grow in coco, I also am always perpetually growing 1 plant in an aerogarden. Simply, its because I use the aerogarden for short autoflowers only. Aerogardens are particularly well suited for this purpose, especially if you have the "tall" version.
I only grow ONE plant at a time. (if it turns out to be a male I just start another one, autoflowers let you know in a reasonable amount of time.)
I only have to make 1 gallon of water, (convienient).
I can run the built in pump and stock lights for at least two weeks before I have to add additional lighting and an airpump.
I grow with BMO nutes. They work best when constantly being aerated.
It is very easy to adjust PH. The bottles I have seem to last forever!
There are some really wonderful autoflowers out there.
If you also purchase a 4X2 tent, lighting and odor control are a piece of cake! AND it does not need venting!! Just open it twice a day.
Autoflower plants in an aerogarden respond well to UFO LED's. (next I will try a Kessil LED)
Except for the initial investment, its cheap and easily provides enough for a personal grow.
Don't overcomplicate this. Check your PH once a day. Add lights when needed, watch your roots so you don't seize the built in pump, do not use Foxfarm nutes, (to much silt), also do not use the fertilizer tabs that come with the Aerogarden, change the built in lights yearly and sit back and enjoy the grow!
Oh and if you have the cash remove the hood and use a LED UFO to flower. I prefer the Lighthouse Hydro.
And allow me to emphasize, only short autoflowers! Read the info on the seeds before ordering. Good luck!