I will try to work on getting some exact dimensions. We are not using it yet as the house is very old and is in the midst of updates to the structure, modern HVAC, electric, etc. It is in western MI so it would need to be both heated and cooled.
If I used the attic space in the house then it wouldn't be too hard to connect it to the HVAC, and there is modern electric already in the space. But, my contractor is adamant that he thinks the attic should stay as is as part of the insulation system for the house.
That leaves the fairly large space over the 140 year old barn. It has been rehabbed so the siding is in good shape and a new metal roof was put on, but it is still a barn, cold, hot, humid, etc. I haven't asked him about the possibility of doing this as I am pretty sure he would look at me like I was crazy. He mentioned in the past that if we wanted to have any living space over the garage we would have to knock it down and start from scratch. But a train room wouldn't require plumbing, etc. My thought is to go to him with the minimum requirements necessary to make it work.
Is this list accurate?
1. Structurally sound stairs and flooring
2. A door at the bottom or top to contain the HVAC
3. Some kind of through the wall heat/AC unit to control that room?
4. Insulation
5. Modern electric... (right now there is knob and tube only in the barn).
6. Lighting
I don't need it to look nice... it is a barn anyhow, so it just needs to be functional. The trains would provide the aesthetics.
What am I missing?
Thanks for all your feedback!
Ben