Anonymity does not modify filing obligations... 

On Day 10, did you use your keys to break in while they were at work, hide a bag of heroin on their property, and call the cops to anonymously reveal its exact location?

A land trust may still be useful to you for providing anonymity in the future, but you're definitely going to want to speak to an attorney who is familiar with your situation and these legal tools.

So how can an LLC keep the LL anonymous and protected from being sued if your actual name is on the lease ?

Google Debtors Anonymous.

He also mentioned that I can choose a series LLC which offers a little bit more protection and costs about $3000 to set up with anonymity $300.

If you go with this plan, it might be worth considering using Anonymous Land Trusts in conjunction with your Traditional LLC to maintain an additional layer of protection.

It really feels like I'm part of a community than just another contributor on anonymous online forum . . .But I've been crunching a few numbers and feel there may be better opportunities in western MA, specifically in Hampden County including places such as Holyoke and possibly Springfield.

It's nice and generic, and anonymous. 

You could even anonymously call your current PM and ask the same things.