My property had a well already, but I had to bring in power. The water table was too high for me to legally to put in a septic system, so I had to go with a buried holding tank that needs to be pumped periodically. A septic system would have been cheaper than my holding tank, but my building site wouldn't pass the test. The stupid part is that there are nearby houses at the exact same elevation that have septic systems that were built and work fine, but they were installed prior to the latest testing requirements. We only have to pump the holding tank every other year or so, which only costs about $75 so it isn't too bad. I went with a regular forced air furnace and an LP tank. I thought about going with a wood fireplace, but that would increase my insurance costs so much that it was cheaper in the long run to go with a LP furnace.
Since we winterize the water lines every winter we had the plumber put an air connector in line so we could open up all the outlets and flush the water out of the plumbing lines quickly with an air compressor. I would definitely recommend that since it saves a lot of time. We keep our furnace set at 50 degrees all winter anyway, but if that went out a frozen water line would be a huge problem if you didn't notice it for a month.