Roman style heating and Bath?

sounds like you have played with this for a while. Why can't you run a plumbing coil system through the base of your fireplace in the split living room kithen. then run that under the floor to the hot water supply both in the kitchen and bath area. at that point you use a point of place water heat system to increase it for hot water use. but while is circulates through the floor you get radiant heat. Or do the same or use a closed system that uses heated oil for radiant heat or you could change it all and have the two bedrooms have a shared fireplaced and be back to back to the bath and warms your rooms and bathroom water. and the one in the kitchen living room area supplies the kitchen hot water supply