So why incorporate my property management duties to manage my own properties?

I don't think I've seen a lease yet that didn't have bits and pieces of a few other leases incorporated.

The Co-owners desire to acquire, hold, maintain, keep in repair, rent and/or sell or exchange, as tenants-in-common (co-owners), that certain real property more fully described in Exhibit "A" attached hereto and incorporated herein by this reference (the "Property").B.

I am in the same situation right now and I've had great tax benefits by incorporating as an LLC, and from what I've read LLC is almost always the way to go on passive income.

Urban areas that expect to experience, or already are experiencing, a wave of immigration should research how to best incorporate these new families.

An unincorporated or incorporated DBA for my marketing business?

If there are any specific laws about them, I recommend reading those and incorporating that into your presentation.  

I agree with you on incorporating real estate into your mix.

I am still interested if at a later time I wanted to incorporate, what the best corporation for a note investor would be?

I am hopeful that if I can do it in the business name, I can take the down payment from the buyer and incorporate it in the business income to then deploy to buy the house for them.