How much to replace heater, refrigerator and axles

Looking at a '65 25 ft Overlander for purchase. The heater does not work and the refrigerator is only electric not two way. What should I be looking at in cost to add heater and change out refrigerator to a two way? The owner replaced the "suspension" but I don't know if the axles need replacing? What would that cost??



Any help would be great on this?

Thanks