Can't discuss pricing. It's a rule of the site. Before you jump in, you need to find out if the boiler will support adding emitters. You need to do a heat loss of the structure and compare that to the boiler. I'm pretty sure the current owner won't tell you that a certain bathroom, or bedroom is always freezing. The heat loss will let you see if certain areas don't have enough emitters, and take care of that, now.
This post was edited by an admin on April 16, 2013 1:29 PM.
Get a heat loss done on the house and the basement. You can zone the basement as one zone and the house as another zone. You can give the house zone priority over the basement zone. How is the hot water heated? You could use a indirect water heater and give that zone priority and use programmable thermostats in the other zones so you can control what zones will be running at what time and keep each zone at the temperature that is comfortable for you and your family.