It feels like everyone and their grandma is on the Do Not Call list nowadays and my worry is the fines associated with accidently calling these individuals. 

A lot of this type thinking is a result of the individual having no understanding, or conception of interest, principal or “the time value of money”.  

We are already surrounded on three sides by urban zoned homes.My neighbors and I have been approached by two individuals, one is a neighbor who is a real estate agent, and the other one a friend of a neighbor, who works with a real estate attorney; both individuals asked us to join them in working with the 5-6 developers they have approached.

I would assume that you'd just simply sell each individual lot to the developer at a set lot price such that your cost to purchase the raw land and improve it to buildable lots was worth the proposed profit per lot.  

Lesson learned - do a better job screening your tenants...Consider investing in greener pastures (landlord-friendly states)

Activities prior to launch, but after you have purchased the property, also count.2) I'd recommend reaching out to the other individuals that work on the property and ask them for an email or time log of their hours on your property.

My first fear for you is that you don't really know much based on your questions and you might need longer to learn it than just trying to get and fund this deal. 22 units, with only 2 multis as experience, makes it harder to find stranger money, but more probably to find friend or family money if that makes sense.

If you both are on the title (you/husband + friends' LLC) you'll both have to agree about whatever disposition.

Unless you’re a very unusual individual, I believe a full service broker would be better for people who lack these attributes. 

There are many good paid coaching programs, but not all are the right fit for each individual.