i dun think ur condo management will allow that if they know it later on.
double storey is quite reasonable ok provided is not gated and guarded.

ya true. even if not ur fault, police don't catch you, you will also be in big trouble.
am sure few rounds going to police station and court.

For property renting, as long as i get a good tenant, i am ok not to increase the renting fees.
don't earn RM100-200 extra per month but you get into big headache problem in future.