heating system

hello, we are currently building our house to old barn because our old house burned down couple of years ago. nobody knows i am writing here, because i would like to surprise my family with new heating system and warming house from the outside too before the winter, but i am not able to do it by myself so i thought i thought it wouldnt harm anyonw if i put this up here. every cent im recived will be putted into houses heating system and warming. right now we get warm from a small oven on second floor but it wont keep warm so by the mornin house is cold again. For now the house has windows, new roof, and second floor is almost ready, downstairs still need to but heating pipes and concrete into 1/3 of the house. we have built it almost 6 years as much as we can.