I am currently flipping a historic church into a gorgeous 4 bed 2.5 bath home. 

The primary value I'd like to get from this is the ability to view all my holdings, look at historic and current performance of key metrics, and aggregate performance metrics across the whole portfolio.

http://stockcharts.com/freecharts/historical/marketindexes.html

We're doing this to beat the historical averages in the stock market too, aren't we?   

And, don't forget that some parks will have a "peak" season, "shoulder" season, and an "off" season, all with different rental rates and historic occupancy, particularly if the park is in a location that caters to snow birds.If the park does not have long term tenants like described above, then you have more of a "rolling stock" park and it will behave much differently.

And even then the risk is exponentially higher than real estate with historically lower returns over time on average.

Both are excellent houses, just I was definitely priced a bit on the higher end.Rather pay for move in than reduce price, I want that rental price to post on listings and in historicals as precedence.

Nestled on 12 acres with spectacular pastoral and mountain views, Batten Green offers three perfectly appointed guest spaces sleeping up to 28: the historic Manor House, the 8-unit Millstone Lodge and the quaint Cranbrook Cottage.

I believe this is absolutely the best time to invest in Jacksonville because of the reasons you described above along with historically low interest rates which boost up your positive cash flow. 

Historically, NE DC isn't the greatest area, but new apt complexes and restaurants are sprouting up rapidly which is making the area more attractive.