Basic live-able 3 bedroom $3000-$4000 pm yes USD
Power you'd have to supply your own generator unknown ?$1000pm
Yes definitely have to have guard $3-400pm x2 $600/800pm
Maid $150-200
Water if not on mains, trucked in $300pm
Yes you can go to the markets but there's no security stick with shoprite.
Children definitely not for Luanda
Holes probably one of the worst in Africa, if your not on a contract with someone forget it.