Low Means resident

Hi There, hoping you can help me with a query re low means resident rules. My dad qualifies as a low means resident , he will have to contribute a DAC of $18.51 per day. My mum continues to live in the family home. When the house is sold my dads aged care fees will increase and he will have to pay the maximum DAC of $59-49 per day, the equivalent RAC will be $537,472. This seems a lot, given the room for a market paying resident is only $400k. Is this generally how it works for low means residents, that the RAC they pay ends up being more than a market paying resident.