As noted, almost all the information is available for free on the internet.  

Given my geographic inability to personally manage the properties and long stretches of not having cell or internet service, I'm calculating 3rd party property management into all my deals.

At 4 it's getting complicated, and thinking of 10+ makes me angry in advance.How do you manage having internet service at multiple locations?  

A good website, people find you everywhere on the internet, you have decent reviews on Google, etc. 2.

After doing some internet research this is pretty close to what I have discovered. 

I have basically a litany of complaints about the way biggerpockets has evolved in recent years and yet it is still by far the single best place to discuss real estate on the internet. 

I'm a former internet marketer and software engineer.

Everything else I've read on the internet was a panicked "GET RID OF THOSE PIPES!" 

Quote from @Ron Pollard: i'm in the market looking to do cost seg on 4 condos. searching the internet i cam across the 2 companies that are mentioned in the thread (KGKC to DIY Cost seg).

With that headline I thought you would break the Internet or at least BP!