Common examples include difficult grading, or an irregular lot orientation. 

I think development is getting more and more common since we're so undersupplied in housing. 

Cash for keys is common, and frequently the part that keeps tenants from moving forward is not having an affordable place to go to.

You should target states that have more common sense and people oriented government and regulations (hint-hint: stay AWAY from Dem controlled jurisdictions.

Jordan, Across MN in the heavy tourism areas, STR PM's are very common.

What is far more interesting is not the dumb greedy investors that refuse to do an ounce of due diligence before investing and then act shocked but rather the scores of sycophantic, mindless automaton like investors in these reviews who give them 5 stars and say it's the best investment they have ever made in real estate, interspersed with RADD apologizing to 2/3rds of the reviewers for halting distributions and redemptions, which in one review they even hilariously claim that "halting redemptions is common practice in real estate."

As far as appreciation, and someone can correct me if Im wrong but looking at all the common markets over an 8 year span, its about the same for all of them.

It’s not as common, though cause it takes a lot more work

Each bedroom shouldn't need to go through the common area to exit the building4.

These programs very commonly involve restrictions and conditions on use, refinance, or resale of the property.