Dear -- all two -- Readers! A wave of inspiration came over me and after a couple hours with 3rdPlanIt, I present to the world Version 1 of an O-scale plan that fits in (a future state of) my basement.
Long term, the edges of the whole basement will accommodate the southern 2/3rds of the line with almost no compression. I have room for a run of about 70 ft which equates to ~3400 real ft and this covers from the southern tip of the line up north to 31st on the south side of Schutte Lumber.
The first phase shown below covers the southern most ~1700ft with just a touch of compression to represent from the southern tip up just past the south-facing switch for Safeway Bakery. A temporary shelf containing an eight-foot run-around and a spare track for storage fills the remainder of the south wall.
All-in-all, it's a pretty faithful representation of the Hill Track, though I've yet to work out all of the grades as this level of detailed editing takes much longer in 3rdPlanIt. Preliminary work indicates that I'll be able to reasonably replicate the signature east-west elevation change of 34th St and the requisite north-south railroad grades in between and level out for the spots.
The unique nature of the spread between Roanoke Rd (front edge, left side) and Terrace St (upper right side) meant that the whole works was pulled away from the wall and a duckunder included under Fred Wolferman's driveway. Duckunders aren't great, but since I was already planning to have the base elevation up close to (my) eye-level, it shouldn't require much ducking. A two-plus-ish foot aisle along the right (west) wall allows one to access the spots along Terrace St as well as view the scene from a different vantage point, so no backdrop.
Anyway, here's the plan (click on it for a larger version):