@Harrison Russin
For cash-on-cash, multi-family will almost always win. That's especially true in NEPA where there is a limit on the amount of rent that an SFR can bring. While there is a market for very high-end rentals (+$2k rent per month), there are not too many tenants in NEPA that can afford that.
From an IRR perspective, it's hard to say. Too many variables to say one class is better than the other. You'll have to play around with the numbers and see what the IRR looks like.
One other x-factor is the new tax law. I really haven't had the time to sit down, talk to my CPA, and really digest it. Based on what I've read so far, there seems to be a lot of interesting changes and new concepts (e.g. Opportunity Zones). But I also can't say if the new changes made any significant impact on buy-and-hold versus flipping.
Disclaimer: While I’m an attorney licensed to practice in PA, I’m not your attorney. What I wrote above does not create an attorney/client relationship between us. I wrote the above for informational purposes. Do not rely on it for legal advice. Always consult with your attorney before you rely on the above information.