Just to comment on the 3D stuff, while the Torque engine is fully capable of supporting full 3D environments, we have neither the budget nor staff available to create the high-quality artwork needed for The Silver Lining in full 3D.
Not to mention, Torque is designed more for tiled textures rather than the detailed ones we use in our game, however we have still adapted it to use 2.5D. If you can find a 3D adventure game engine capable of importing Maya files, and uses C++ style scripting for $100 or less, then be sure to let me know.
