XD my aunts used to grow just one point all over i think they will be fine im not sure why it does it tho maybe the light switch? have you gone from one light to another lately?
something like this will help alot when it comes to seeping air. this will allow the fan to pull from your room vent before the door because its the biggest opening making it easier to pull air from. then try getting garage door rubber bottom on amazon too and seal of the bottom.
The carbon filter i have i only use for budding and i wash the cloth every month so it lasts pretty long. washing the clothes constantly is something they dont want you to find out XD
Home depot should have something for garage doors to keep air out and air in maybe try that and maybe some rubber that is on car doors for the sides it might make it hard to close the door but that means its working
can you afford a cheap led? if so tell me how much and ill send you link for a grow light and u can keep it in a small 2x2 space in your house just worry about low humidity
most people say dont but i just water right at the base barely enough to get the roots wet so i dont over do it. i use a water bottle and split it between 7 plants