The process of supplementing is how to ensure that the other things you mentioned (additional layers, drip edge, code items, etc.) are included in the scope review.

Heat pumps are a supplement to a heating source not a replacement.My hope when I was thinking of adding heat pumps to my apartment building was to find a way to have my baseboard system automatically stay off till the outside temperature was about 40 degrees.

do uber Lyft etc... to supplement the monthly costs?

If that's the case, try again, but use an ES that includes a section showing your lack of experience will be supplemented by an experienced GC.  

Is there any way she can create cash-flow in 10 years that can supplement her rent and expenditures by using her $28k she has saved?

My goal is 10 SFH, as I'm just looking to supplement a $3,000 a month pension (inflation will slowly drain its buying power, so turning to real estate to combat that effect) that I'll start drawing from in 2023 at the age of 53. 

I've been set for a while on getting a multi-fam to house hack about 30 minutes or so north of Boston which would also supplement my income to help.

to supplement my pensions and 403b.

Some of these are pretty specific to single-family and small multifamily in western Pennsylvania, so I'm getting some of your "cold/temperate climate" supplement.- Continually monitor/check brick veneer for repointing, sagging.- Check chimneys for cracks every two years in elderly properties.- Annually trim back tree branches extending near or over roof.- Perform radon test every 5 years.- Perform sewage line inspection every five years, especially with old, established trees in obvious vicinity to sewer line, maple root systems are typically shallow and extensive (<5 feet)/oaks go deeper and never stop growing even if the tree branches keeps getting trimmed back (>5 feet).- Monitor typical icicle build-up, watching for insulation/roofing degradation.- Glyphosate weedkiller application 2x yearly, early spring, midsummer in problem areas.- Check window trim for wood rot (I have a constant bone to pick with window replacement companies that offer window wrapping for older homes, completely hiding existing trim as it degrades further and lets in more cold air!)

What supplemental materials do you typically ask for?