People stop building in flood zone, stop rebuilding in hillsides with brush and timber6. as you say investors give up and dump properties making prices of real estate decrease but hold costs only for the rich. 

One multi-family using salt isn't going change much.Let the tenants choose and purchase their own gear, whether it be shovels, powered brushes, single- or dual-stage snow throwers, ...

Schlage Encode is way more than you need, and 5-10x more expensive than other viable solutions.Try a simple static code lock like this.

I use truair or Schumacher registers in order to manage static pressure plus I add more returns to alleviate the poor air exchanges.

They are too busy whitening their teeth and brushing their hair to get dirty

From city to city, they all seem to just provide static Open Data portals.

I did all of the obvious repairs needed and at every opportunity, I chose to use premium material (quarts sparkling white counters, Sterling Oak plank flooring, 6in baseboards, hands-free brushed nickel pull-down faucets).

I've gotten one bad review over this and had another guest that thankfully still left a good review, but let me know in private comments that one of the guests in their party was extremely angry over it.I've brought this up to StayFi several times and they just brushed it off. 

If you want to brush up there are 2 good books in the BP book store by J Scott - one is about flipping the other about estimating rehab cost.

I’m painting bedroom doors on a property, rookie DIY, and after painting, the paint is peeling with the slightest brushing of a tool or finger nail.