Gonelifting I commend you. I know exactly what you have gone through, given that a few years ago I finished my parent's basement for them pretty much all by myself. The space that I finished was around 1000 sq. ft. and it took me around 12 months or so. Everything from studding (used metal studs to save on costs, dust from sawing, and weight), drywalling, electrical (put up potlights as you did, receptacles, etc), plumbing (for a bar and bathroom), flooring (tiling and hardwood), and all the finish work of course. Lots of other things like breaking concrete (fun fun fun), moving the water tank, breaking down walls, etc.
You did an awesome job man!