This is one of my favorite features of Bigger Pockets especially for asking specific questions.

I'm still new to the site and all the features they provide us with.  

I plan to buy on an existing credit line which is another appealing feature- not having to go looking for financing.  

If they have a bank account, ACH or Dwolla should be good enough to send money I would think.With my plumber, I will typically send a check using the Bill Pay feature in my bank account  (USAA) and he will receive a check in about 4 days

What features or demographics indicate that an area is improving?

Hey Malik,One method you can utilize is the advance search feature on most brokerage websites.

Would it be possible to add a filter feature when searching for people?

Welcome to BP @Brent Kromer Find and network with local investors using find feature!

Your parcel would be known as the dominant tenement - meaning it benefits from an easement across another parcel - this is a national standard that most municipalities abide by, simply because it's common sense, but people (and cities) do things for reasons not logic.  

This is how I do mine.