Use the BP keyword alerts feature.

Use the search feature and look for those threads.

I like the search features: https://www.biggerpockets.com/searchAlerts can be really helpful too: http://www.biggerpockets.com/alertsThere are a few self-contained guides that you can access here: https://www.biggerpockets.com/guides

I like the search features: https://www.biggerpockets.com/search

As for desirability - it is really a combination of the difficulty of travel (remember Uber uses Pittsburgh as the testbed for their self-driving cars due to difficulty and abundance of "features").

I wouldn't recommend it for a rental home in my area - unless that was a common feature in the market I was renting in.In general, in my area, unless the house has a basement with a perimeter drain that drains to daylight or has a very low water table, it seems likely to me that the basement will "flood" at some point. 

Investing in the app or investing in a deal featured on FundRise?

I like the search features: https://www.biggerpockets.com/searchAlerts can be really helpful too: http://www.biggerpockets.com/alerts

They have their formula based on features, functions, HUD market, family size, expected tenant contribution, and what is included/excluded.

I keep the ad very simple with a bulleted list of features.