A sliding door vs. a sliding window? Both should give about the same functionality for egress and an alternative entry point during the renovation. The rub on the sliding doors is that they will be more expensive (especially at a custom sized opening) and will usually have more heft on the frame and door sash (i.e. less glass) than a sliding window.

Not a great idea. : ( Sliding doors belong in a garden view, at the back. No matter what your window covering is.

Unless you plan to be carried from THIS house on a slab. Feet first.

Not the "usual" so it will hurt resale. Many would assume it's a safety risk. Most people don't want their bedroom at the front of the house PERIOD so to accentuate the fact....just not an idea with traction.

The large bow window in our ground floor bedroom was great for watching birds. Don't know what they cost relative to a sliding door, but might be worth checking.