No, 14 CFR Part 107 only applies to sUAS weighing less than 0.55 lbs. Yes, there is no lower weight limit for operating under 14 CFR Part 107.   No, roof ...

Not to exceed 30 days. Within 10 days. Any time.

30 days. 10 days.  90 days.

Visual observer.  Person manipulating the controls. Remote PIC.

55 lbs. or less. 55 kg or less. Less than 55 lbs. 

An injury requiring an overnight hospital stay.  Minor bruises. Scrapes and cuts bandaged on site.

Without the possibility of direct human intervention from within or on the aircraft.  For hobby and recreational use when not certificated. During search and rescue operations other than public.