I'm kind of new here myself, but will offer what I've learned thus far...

Garages are not the best place to host a grow. If you spend some time scouring the FAQs, you will learn more. Temperature and humidity are difficult to control, depending on your location, and stealth and secuity are a concern.

Given that you looking at six plants, in my very inexperienced and humble opinion I would suggest perhaps considering a ready-made grow cabinet. It addresses all the issues you spoke of, and is pretty much self-contained.

I expect the more-experienced people will be along to offer good advice. Take your time planning this out before laying out any cash. I spent many, many hours reading and thinking and reading some more. So much to learn and understand...

Good luck with your grow. :smokin: