I've been told Blackdiamond.com is a good one and @Justin Silverio hosts a quarterly meeting in Reading. 

And then on Friday in San Jose is a great meeting hosted again by Johnson!  

There are a few meetings on the North Shore, @Justin Silverio hosts a quarterly meetup in Reading, the Boston Area REIA in Medford gets a lot of NH people and the Black Diamond meeting in Waltham is IMO the best local event right now and well worth the ride. 

As for hosting, GoDaddy or Hostgator will be all you need for under $20 a month.

I listened to a podcast shortly after I started that thread and the hosts were even debating what to do with a property in a down market, but one agreed with the"dollar cost averaging" idea.Anyways, it's been discussed that rents do not follow home values necessarily and this data backs that theory: http://www.deptofnumbers.com/rent/us/ .

I sometimes host SF meetups as well as SJ meetups with one next Friday.

The house CAN sell with the judgment liens on it but they will remain as a cloud on the title until they're paid and a Release of Judgment is filed with the Register of Deeds.

One other thought I forgot to mention for you specifically would be to make sure they are using cloud/web based property management software.  

I personally would only deal with licensed agent and close with title company for them to do title search and grant GW deed so that if there is clouded title or liens on properties the owner or bank will pay it.  

At a local meetup I host, we invited one of our local note buyers, Robert Young, to talk and educate us about the process.