oh, then this is not a good place to be then....this will sure happen in future...i suspect this is an ex-mining land, so the floor slowly sunk(obviously less than 1 cm lah for 1 year maybe...)

are you sure the maintenance is rm500 ? even if it is rm200 then it is quite costly...when there's flood, then the pther facilties also will affected indirectly. hhmmm, not good.