Well, I've been in digital marketing for 20 years and I noticed that you aren't advertising on Google.

This was done with the insulated duct foil sandwich material (called duct panel, at least in one brand), so it's at least easy to remove where it's been done too much, but it's actually part of the problem. 

I immediately got the question around being a cash buyer or using hard money on something advertised as a "turnkey" property. 

With contractors hard to find and materials costs still elevated well above where they were pre-pandemic, BRRRRing is not nearly as safe a bet as it once was, especially not with a ticking clock of a hard money lender.I've noticed on the podcast lately they have started saying things about "Just getting in" and "not trying to find the perfect deal", but just something that "gets you in the game"...

So idea is that I would post my favorite deals and some information / material there.

Where would you recommend that I advertise my services to other investors?

From what I read, it is basically mandatory to replace knob and tube wiring due to the degradation of material, and no grounding.

Hard to believe 62 square feet could make a material difference. 

Time costs, material costs, regulatory costs and mistake costs.

As an estimator in the construction industry, I second @Rodolfo Goncalves; inflated material prices and labor shortages has made development very costly right now.