The value of money decreases. 

This would make your property value decrease and be less marketable.

With competition, quality rises and costs to the consumer decrease.

I have seen everything from single-family homes, apartments, and large multi-family buildings go green/near-net-zero and at the same time: increase revenue, decrease warranty issues, decrease turnover, and have happier renters who take better care of their units. 

The only good news I can think of is my insurance and taxes may decrease however I did buy this property with the intention of having 3 separate units.

Many neighborhoods here it decreases the value of the property.

You also have the option of offering to split it with the tenant, but again this increases cost for the tenant and decreases likelihood they will apply.

Some properties currently sleep up to 40, so up to a 35% decrease in what these owners are allowed to advertise.

If the area has a significant population decrease over the past 10 years, you probably won’t ever fill your lots.I have purchased parks in poor condition and I figure 2 years to turn them around but you need a pool of possible renters or owners to pull from.

Here it is, and since I'm telling the wive's tale I'm going to say it took place in 1984 when rates on a 30YF were at dystopian 15% to 20% levels: Bank branch manager, after lamenting decreased volume due to higher interest rates (ring a bell?)