For those who have participated in these groups, is one (DelCo or Chester DIG subgroup or New Castle DelREI) better suited for or more welcoming to a buy/hold newbie?

Let me suggest a smaller multi-tenant property like a strip center or office building with multiple suites or even mixed use.

Meaning you drive outward from the place of employment until you find the house that suits your needs and your budget.

Even if you do nothing wrong, someone could file suit against you.

We bought a home in town that has a mother in law suite with its own entrance and we're renting it out on airbnb.

In our experience:1) Doesn't suit their needs for space.

You will be swimming with sharks.

I gave up on playing games with the sharks swimming around the Denver Metro.

I've seen many people fail because they were trying to work a plan, a program or a strategy that did not suit their ability, their knowledge, or their interests. 

It didn't help her situation that she submitted a picture "of a wet basement" that showed no water, and her daughter actually confirmed that there was no water.While it's possible in your situation that some moisture from the roof leak may have contributed a bit, the underlying cause was the heat from the blocked dryer which was due to negligence by not cleaning out the lint trap.If it's one lease with all 4, and you have a "joint and several" clause, I'd name all 4 in a suit.