When it comes too indoor garden you have too choices buy a grow tent or build the room out of reflective sheeting both have pros and cons.
Grow Tent Pros – easy to set up quick and east self contained no damage to property also easy to dismantle. Cons – because it is an enclosed room usually full with plants maintaining the temperature and humidity can be difficult.
Building a room Pros – Larger work space easier to control room temperature and humidity. Cons – time consuming to set up and damage to the property can be expected.