I need a budget robot vacuum around rm300, as a midweek part-time cleaner. I would consider spending rm500 if the robot vacuum is efficient enough to replace my weekly vacuuming routine, though I still need to clean other spots besides the floors as my house is very dusty. (3 BR apartment <1000sqft)

What feature should I look for?
Is mopping feature any good or should just focus on vacuuming?