Each time I've not paid attention to those yellow caution/warning lights (similar to what you're seeing) it has cost me.  

Any of the 3 above and I get concerned about foundation issues or settling and it's the first inspection I have done.I also make general notes of what needs redoing so I can estimate out materials and labor.As I'm going through, I check for plumbing leaks and try light switches.

I’m always looking for properties in the $20-$30k needing light to medium rehab in good C neighborhoods, so if you come across anything, I’d like to know.

Try sending out marketing materials -- in my neighborhood, for example, every tree, every light post, every telephone pole is festooned with signs, "I BUY HOUSES, ALL CASH".

Rehabbed property cosmetically -- cleaning, painting, new fences, garage doors, lighting, faucets, A/C units, appliances and landscaping.

LED lighting in common areas3. ?

Corrected utility billings, implemented conservation efforts, such as replacing all exterior light fixtures, tightened policies and increased curb appeal and remodeled office & interiors.

Perhaps update some appliances - lighting - etc. those things that are quick and easy and make things "pop"!

I have a six month daughter and she is a light in my life and also alot of work. 

@Aarron Light Excellent example of creative RE problem solving.