I'm a little bit confused about the process of going through the MassSave program in a multifamily rental property in which none of the utilities are actually in my name - I was told that setting it up with the electric account number for one of the tenants is the simplest solution, but I'd prefer not to have to go through them to get it all done.

A lawyer would be best to advise you on the simplest way to make the zoning change happen as it is typically a case by case decision. 

The best and simplest approach to vetting a wholesaler is to grill the last 3 or 4 investors who purchased a deal from them.

But it isn't the simplest process. 

What are the simplest ways to structure the partnership?

Insurance by it's simplest definition is a "transfer of risk".

It's a two page lease in the simplest language possible so it really doesn't mention much of anything.

@Callum SinclairThis is a month-old post, so I'm probably late.The simplest and most effective setup is usually to keep the whole business under your name or an LLC that is 100% owned by you, and set up your family members as lenders, as opposed to partners.If funding the deal makes it impossible, due say to your credit, then you can reverse: have your dad own the property under his name or his LLC, and set yourself up as a contractor for him.Bottom line: it is case by case.

Simply doing loans and paying interest is the simplest way.

Just hire a home inspector/contractor to look at them would be the simplest solution.