Some of their resources are more pricey than others but they are all quality.

The plumber will likely have to cut open the ceiling to confirm and make repairs, so you can save a little money by learning how to do that yourself, confirm the problem, and then call the plumber for repair, then patch the ceiling yourself.As Jonathan is trying to point out, it's important to expect these things and have funds on hand to deal with them.

You might hit a few bumps in the road...tenants who imagine due dates are more like suggestions, or unexpected repairs that crop up at the worst possible moment...but that’s part of the ride.

Consider FHA loans for lower down payments and reserve for repairs or upgrades.

They're fine for buying a turnkey, older home that gets "spruced up" and comes with a 1-year warranty on their repairs.

No worrying about renovations or repairs, so you can start making money quickly.

I am just looking for insight from local MA realtors, attorneys or landlords regarding what my typical monthly expenses (if any) will likely be (I don’t mean one-off expenses like roof repairs). 

Course of prior conduct may be used to determine what constituted acceptable quality.

I had the sense to record the conversation with himself and the project engineer and the audio quality is quite good.

It will depend on the quality you're looking for..