If it is an A class rent area, you can look at decreasing.

Say I buy a value add 6-plex, restore it to a prime income producing property by increasing rents or decreasing costs etc.., and then I want to sell it and realize the difference in value.

I am investigating if it would be advantageous for us to reduce our tax liability (decrease profits).

This means your spread on a scrape and new construction keeps decreasing.

What are the best ways to research how values may increase or decrease in specific areas?

If you buy a property for $45k and your rent is only $250/mo. .......your wealth will decrease over 5 years.

The real estate crash of 2008 really started in 2006 with increasing inventory that lead to decreasing prices.

There's not much I could do to decrease the expenses other than homesteading the property and decreasing property tax by about $1500/year (new payment would be $1050).There's what I know that I could do to increase profitability 1. 

If you're struggling, you can decrease your expenses or increase your income.

in charlotte, a lot of owner occupant buyers want condos, but they can't get financing because a certain percentage of the condos in the complex are rentals...certain lenders, and I think FHA is included in this if i'm not mistaken, won't lend on the condo if it's mostly investors...just decreases your potential buyers and another reason to stay away from condos....i also don't like when someone has control over your investment, such as an HOA...sure, the dues may be cheap this month, and this year, but who knows when and by how much they'll increase those dues???