Its in very stable area and in a school district in suburban PA with 8-9s from grade to high school , two small single family homes on the same lot of land.

Link below.https://www.biggerpockets.com/blog/guide-grading-indianapolis-neighborhoodsAs for 46218 I wouldn't advise it unless I had my Section 8 skills on point and boots on the ground. 

SFH using the BRRR method: Working class neighborhood (B-, C+) and improve it 1/2 a grade higher thru a modest rehab, around $200k all in. 

Small fix up, paint cosmetics, build a front office space, up grade some exterior features, signage and shop equipment.

I would then grade the MHP based on area/tenant base, look at ownership of roads, metering, and all the other important DD stuff mentioned elsewhere.I think the above criteria puts my max deal size at around $288,000 or so.

Also grading the surface to force surface water to run away from the foundation even just a few feet can make a difference.

Yes, despite the anecdotes ("my sister's brother's son's 3rd grade teacher said she canceled her vacation because of gas prices"), the data is clear on this and the data back up what you said.Travel demand is still at record highs. 

Our highest bidder, a downtown-based construction GC business, could not tell us what grade of lumber was quoted, would not share what brand of garage doors they used ("local vendors"), would not identify their steel beam and column supplier or water service vendor.

I buy at a big box store contractor grade in 5 gallon buckets,  and use the same color # as a Dutch Boy color I liked,, I use Wiskers, a light grey/tan it's beautiful, and depending on room depends on type of paint.  

Right now around here (I live here in your market) if you are talking basic turnkey - nothing specialized - you're going to be right around $200/sf finished, not including permits or ancillaries (IE you need a bigger septic system, you have to do major grading work for the addition, etc).