I have a 2,000 square foot two-story home in upstate NY with baseboards and two zones. It is used only on the weekends. I'm planning to switch out an old oil-fired boiler and local contractors have suggested either Energy Kinetics 2000 or Buderus G115ws with an indirect hot water tank. My question is whether an indirect-fired hot water tank makes sense given that we only use the house on the weekends, and can otherwise shut the boiler down over the summer. Should I install a separate (propane?) water heater and just use the boiler for the baseboards? And given the two brands is one preferable to the other?

Another alternative is an on-demand propane boiler/water heater. Should I consider this as an option?