Mark, good luck on the sewer hook up, we did everything we could not to hook up to sewer in our old house as they wanted $1200 to hook up then $75.00 a month for the service. I snuck in a new drain field on one weekend and it is still working. That was 10 years ago.
I would grab all the free lumber you can. You can always use it somewhere else if not the train room! I will be heading out here in a little bit to get working on the train room. Its my day off! LOL