Couple other things to consider, property / school taxes are high, and tenants have lots of rights.

You can determine if the cost segregation study makes sense by speaking with your accountant and many cost segregation professionals offer a free analysis.

There are a lot of websites that offer the course online, or if you have a college near you, they also typically offer a class that satisfies the pre-licensing requirement.

Applicant credit scores should be treated with a high level of care and should not be handed out when they aren't assured that you are locking them up and taking due care with private and sensitive data.So, many places, including the screening company we used for years before moving to a PM, provide a suitability score rather than the actual credit score. 

They can offer valuable insights into the local market, potential rental yields, and specific considerations for a rehab project like the one you're planning.

I won't just write them all here but I highly recommend contacting a qualified 1031 intermediary to walk you through the process.

If you want to quote out high efficiency boilers for six Tripple deckers for example requiring installation of separate gas, meters etc. etc. - that might be a situation where you would want to work with a contractor directly because you would have lots of different options with widely varying costs.

Lessons learned is not to buy a property with a high HOA.

Double check financing before making an offer.

I have a second condo property where the water quality became unacceptable (PFAS) so I put a filter on the sink and make people aware the fridge water no longer works.