I too considered a year round burning with a boiler, but I don't think I'm into it.. There probably would be a little money saved over using electric for DHW but would it be worth the added burden of running the appliance? A 110 pounds per week is $47.30 per month (at $200 per ton) Plus the additional cost of electric the appliance uses. How much more would an electric water tank use? Another $20? There are pros and cons.. Heres a few I looked at. I'm sure more can be added to each side but these seemed most important to me.
No worry of corrosion from humidity since no down time
Too much heat in the basement
The added burden of tending
Problems with draft in the chimney when its warm outside
Out fires due to scarce calls for heat?
I've concluded that I'll be happy to save on electric while I need to heat the house and not worry about it in the summer
Hopefully someone who does burn year round can chime in