What's the best setup to save on heat and hot water.

I’m buying a home and need to replace the boiler and hot water tank. I want to try to save some money on my heating costs so I’ve decided to go with either a wood burning boiler or a wood cook stove. Then I’ll tie in the hot water tank to either option. What’s the best/cost effective way for me to set this up. Keeping in mind placement of the boiler or stove in relation to the water tank located in the basement and how to heat home and get hot water in the warmer months. My home is 851 Sq ft, 2 floors + basement.