An addendum will suffice. 

Suffice it to say the entire street is pretty peeved, and are looking to me to see if there is anything we can collectively do to encourage this guy to at the very least move it into his backyard off the street.

He advised me that a postmarked check won’t suffice.

A cookie cutter builder would not suffice.

I can go on but I think this will suffice.

There are a variety of reasons for this, but suffice it to say there are easier clients to work with than the type of DIY person who is working feverishly to find inefficiencies in the real estate market.4.

When bringing partners into a purchase like this, do we just form a corporation specifically for these properties, or would a joint venture agreement suffice

i would verify with your local city officials if they will allow to have something built on that ground. from what i've read, you'd have to put in some good $$$ for them to sign off on it (eng reports, etc). simple demo and fill will not suffice. 

Do you feel an email would suffice since I don’t have the PM’s address?  

In the most simplistic form, an "inspection contingency" or "due diligence phase" contingency of X amount of days would suffice.