Then I would paint the existing siding two shades lighter.

Fiberglass is the cheapest type of material that tubs are made from.I always recommend only a quality lighter weight cast iron/porcelain tub and proper ceramic tile surround with all new waste, drain, overflow, and supply piping and faucets.

They said there must have been a power spike, the spark lighter stopped working.

Ill cheat on 70% on lighter rehabs or high dollar ones in super hot areas, but still use that as my guideline.

Rear seems to be a standard offering where ever have seen.As to the BBQ...you may have insurance requirements re not on patios...to close to the structure will burn it down.You might want to offer either park type charcoal bbq's on pipes in the common area, or a built in gas bbq in the common area.Remember those charcoal ones use lighter fluid and can flame like an inferno.Maybe put out some chained down picnic table in a dedicated bbq area with trash cans (???)

For instance, MF may seem like a great way to go based on your research, but the market may be so hot its difficult to find a good value (needle in a hay stack), so where might be competition a bit lighter and demand still strong.  

Lighter will always make things look more spacious.  

Replace the electric outlets & covers with a lighter, neutral color (white or bone). 

Kitchen install will be sub'd out to an all-in specialist.Progress photo updates of the interior paint shown below - The wall gray was a lot lighter than I wanted but I had to make some sacrifices to keep the contractor moving - my first choice was backordered a couple of weeks.ALSO - I'm looking into painting the exterior and possibly adding some trim to pop like the below - I would leave the brick as-is (just power wash it to remove flood related grime). 

This profile is ideal, but lighter value-add can work, too.