Baseboard question

[RobertInOntario]

Rob,
Something that large will need two or more people to move it once complete. With legs and associated parts, you're looking at a substantial "kit".
I would first recommend breaking down the layout into two modules, width x no more than 4 feet; in your case, probably three feet.
Second, with respect to construction, you need to engineer strength into the modules to keep the weight down. Don't go for a slab of plywood with 2" pink extruded foam on top. The foam is actually quite strong once reinforced with a frame of 1x4 or 1x5 pine. A cross brace underneath is needed only every 18-24".
A pair of these can be boxed as a set with end plates and makes for a compact and light package that can be moved easily by two people, or one with a cart.
This is the way that the modular club that is belonged to built them. I actually built 24" x 6' and I regret the size. I haven't even added anything to them.
Take a look at HOTrak.ca and railwaybob.com for ideas.
Andrew

Thanks again for this feedback, Andrew. Once the layout is finished, it will still be quite light since most of it is just foam board. I could easily carry it myself (when walking on the straight and level) but the hard part will be maneuvering it up & down stairs and around tight corners -- that's where I'll have to enlist the help of my sons. I'll see if I can get my neighbour -- who is a wood-worker -- to help me cut up and make the frame. His results will be much more professional than mine. (This neighbour is also slowly working on an N-scale layout.)

Are you no longer a member of the modular club? Just curious as I seem to recall you were quite active with them.

Cheers, Rob