To avoid being redundant, I will just tackle your original question, assuming an LLC is right for your situation/comfort level.What I am about to say is from my own personal, recent experience.

So far I’ve been able to recoup the initial down payment, refi closing cost, and 100% rehab on each property if tackled.

They did a great job tackling a very complex topic.

Would love any suggestions or ideas on how I might be able to tackle this.Goals for me would be: cash flow in the short-term, then a little profit on the sale in a few years.Goals for him: keep him in the house, don't let him go into foreclosure, let his family stay in the house, purchase property back at a discount in a few years.Would love a win-win situation here.

Well, I just heard the right thing one day and I realized that I am fully capable of making it happen.So now I'm about to purchase my first rehab, will have a very interesting project to tackle over the summer, and start taking a much more active role in my real estate investing business.- if - it - is - to - be - it - is - up - to - me -

I've got a fully renovated duplex in Baltimore City, but looking to tackle a 6-10 unit Multi-Family property next.

Also, what should be my main concerns with tackling this part of the negotiation alone?

These people have more important issues to tackle than school quality.  

John D. the cost of removal is going to be very location specific,  seeing that you are in PA and the property is in NJ I would assume it is something you are not going to tackle yourself, even though you are posting in the DIY forum. 

With you having no skills, I would recommend that you try to tackle small jobs yourself.