These incentives can help offset the costs of new construction and make it more attractive than flipping homes.Demand: In a recession, demand for homes may decrease, but it is likely to remain for new construction.

If your seller doesn't want to go for a price decrease, there's not much you can do.

I would recommend sticking to Facebook marketplace; despite the decreased results you're experiencing from standard posts, it is worthwhile to be consistent and develop a reputation.

They may not decrease in value, they might, but it will at the very least slow their growth.  

The property was built nearly ten years ago and has a tax abatement that is about to expire this december, and we tried to exit at a loss over the last year or so but have not gotten a single offer (even low ball) after listing several times at decreasing prices.  

You have to want to live there2. decreasing living expenses while living there3. cash flow when you move out

Returns improve and odds of large losses decreases.

Does it add value or decrease value? 

About property appreciation, I see lot of properties are either stayed the same value for years or even decreased.

In a nutshell, you lease the whole property based on the current income, improve conditions, decrease vacancies, improve cash flow and enjoy cash flow or exercise your option when you have a buyer willing to pay for that increased cash flow.