TJeezy well for 2 or 3 plants i'd research on here about GFL GROW BOXES. im currently working on one and from what i have seen people have good end results with them. check out my grow for a genral idea it might help a bit ( i can do 2 or 3 plants in mine) but any other questions dont be afriad to ask us other fellow growers. Now a question for you. Are you able to take pics of the space you want to place your grow box in? And for the mold i would use some diluted bleach w/ water and wipe down some the basement when you plan on placing your grow box.