If it is small (say less than bond market) it is a strong indication that you will better off to sell and redeploy your capital.  

Without getting your own research that indicates you will be able to get a zoning variance, I would not assume that you will be able to get a zoning variance any time soon to have a legal 3 unit.  

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Clear signs of cooling rents, vacancy upticks, investors vacating the space, foreclosures, capital calls are major indicators of this happening nationwide.

Might be a good idea to see if you can get equity financing on a small portion rather than the whole thing, to keep payments as minimal as possible.

I've heard that looking at the average cost per acre versus the cost of the property can be a good indicator of whether you want to invest in repairs versus teardown.

He had a basic undermount stainless sink that he threw in for minimal charge.

What are some factors that indicate a market will experience growth in coming years?

The fact that you do not have the reserves to handle this after 10 years is a clear indicator that your allocation to maintenance/cap ex is insufficient.  

A small number of newer homes built in the 2000s also sold.Days on market were not always reported, but many homes sold within 1-2 months, indicating a fairly quick-moving market.