Sorry bro, but I do have to agree. It is your parents house...if anything ever happened, even if there was a fire upstairs from a candle, their insurance (not yours..) Is COMPLETELY VOID. They could lose literally Everything because of 1 little innocent plant. And No one is ever going to give someone credit, a mortgage, anything if their insurance was voided at one point due to growing marijuana.
And do you have any idea how big some of the fines are for growing? Fines from cops, electric companies, whos gonna pay the $50, 000 fine? You wont be charged, your parents will get the fine because its their home, they are responsible or ANYTHING In that home.
You might not want to hear it, but if you ever go through the process of buying your own home you would understand.
Perfect example would be if you owned a house and rented out the basement suite. One day you have a fire in your kitchen, no problem, insurance covers that. But then you find out the person renting the basement has a plant in his closet. Suddenly your insurance backs out and YOU are treated like the criminal, not the victim.
Anyways, seriously think it through man, I dont think your accepting some of the major reasons why this is a horrible idea....heat, mold, parents.....I could go on and on and on.
Anyways, good luck man.