The more eyes the better, in my opinion.

I have carefully gone through the documents Lease Runner has created for Massachusetts and been very impressed with their ability to cover the Massachusetts laws in detail.

You need to be doing this type of analysis on each of your deals with this level of detail.

I believe that some overriding indicators for success is attention to detail, ability / willingness to learn and listening to the experience of others.

They simplify everything, which has pros and cons; It's a ridiculously easy process (compared to buying a residential property), but if you're a detail-oriented person (like myself) you may be left wanting more information at times. 

we have prepared detail business plans, we also have proper income statements from last two years and have good credit history. 

What other details of the strategy I have outlined here am I overlooking?

I am not sure what other details are needed to answer my question but I am feeling like these developers might be trying to take advantage of the fact that we aren’t that experienced in real estate deals.

Write out the basic agreement on a yellow pad and include all of the details.

Still, something to keep an eye on.