The SR1 literally doesn't have a shitter or any other basic living requirements a ship would need for LONG TERM STEALTH RECON. It's internal design effectively makes it an oversized fighter craft that needs to dock constantly or else there's gonna be some real problems. It does not even remotely possess the basics a craft of its design would need; so much so that they literally had to retcon doors and escape pods into it that can't physically exist. Go ahead. Show me where the escape pod hallways and access hatches are inside that thing in ME1.