l.. statistics show only increasing prices.

However, I'd really like to get into the nitty gritty numbers, statistics, and marketplace trends as I'm a bit of an analytics guy.

The appraiser is right, statistically the resale value of rooftop solar is extremely low.

Gather the recorded statistics to make your case. 

Check out the statistics of people.

@Joe Villeneuve i am sure you have hear the statistic that economists have been able to accurately predict ten of the last three recessions.

But note - these maps are updated WEEKLY because they have so many hits: http://www.ci.minneapolis.mn.us/police/statistics/crime-statistics_codefor_shotsfired 

(duplex built in 2010 with $5400 monthly rents @$706K purchase price in South Central LA, 2 miles to Downtown LA) One thing about LA market, especially these neighborhoods is that you have to know them very well, the statistics don't work here because each street is different and they can be a world apart from one street to another.  

I've looked up statistics and data but am just curious what people from that area think.

What's most important is that any provider you work with has solid, statistical figures for their expenses so they can show you what the most likely scenario is for your returns.