While some might do this, I don't believe it will be a widespread problem.There are three reasons why this will not happen en masse:1) Capitalization: The landlord is typically well-capitalized, with 6 months of reserves for precisely this type of situation.

However, I do not know what the tenant laws in Mass are so it might be worth either calling a local office or doing a basic google search to see if their are any details such as needing something to be notarized, or if there is a specific state template that needs to be filed. 

Funds or syndicators most wouldn't allow mass cash calls from investors to get their liquidity back.

I am located in central Mass.

I don't like mass emails.

It is her smarts and my muscle that we will use to invest with.  

Are there any apps that provide landlords and tenants to have a direct line of mass and individual communication?

For investors, (unless you're doing mass volume), it doesn't make sense to pay full commission...For average Americans who do 1-2 RE transactions every 10-20 years...they don't know any better.

We've all had to flex those creative muscles to navigate these days. 

Is the location able to support a downturn in the market or will people start to mass exit the area?