Well first of all…you have to realize that most HO track is NOT UV stable…this means that the ties are gonna disintegrate over time unless you paint it very heavily with a UV proofing type of paint…I beleive I read that PECO products were UV stabilized, but they tend to be pricey and hard to come by. Then again…with prices of flex track and its relative availibility you could prolly relistically replace all your track sytematically every few years as it failed…
Then you have track cleaning to worry about, dirt and debris don’t scale very well…neither do squirrles, birds, pets, children…and you are almost certainly confined to track power. Which I’m not saying it wouldn’t work, but theres gonna be a lot of maintenance involved. RC Battery for Oscale/On30 has pretty much been killed off by the DCC movement. I finally relented and purchaed a DCC system to install on my layout.
If I were to do it, I’d do it much the same way I’m building my Large Scale System. Fixing the track to pressure treated 2x materials adequately supported. Anything smaller just doesn’t provided a stable roadbed, then dress it up from there.
Hmm over all though…if you weren’t doing…a large complicated system, it might be manageable…