G,it depends.If you are running around a shed at all hours and in the night,the neighbours might think you are growing pot,and trouble is brewing.If it is done at home, with proper ventilation,no "visitors" coming and going all day and night, and no chems delivered anywhere near the place,no one will likely ever know.
P took a year to buy supplies, not in P's name,waited 2 more months,and no one else knew.No funny chemicals/equipment were in the area,except when needed.When not actively working,everything was cleaned,and was stored seperately.This way,P felt comfy working at home.So,if you are only going to be working for a couple days amonth and are very careful,the house would be best,IMHO.