Without getting into ways to finance the deal (though I would love to), how do I execute a WHolesale offer to the estate owner AND find a flipper to buy the contract from me? 

Additionally, you will have the executed month to month leases.Most local Realtor associations have standard residential leases for their members use.

If/when the OA is executed, the third contract is signed...which is the typical Purchase Contract.

Formulate a solid plan and execute with discipline, don't go all in on any one property, you might even start with one property and see if you like being a landlord, or flipping or whatever you plan to do.

(a) A potential seller may not execute an executory contract with a potential purchaser if the seller does not own the property in fee simple free from any liens or other encumbrances.

What are peoples thoughts on this, and has anyone ever seen the "due on sale" clause executed, and would this even apply? 

The previous owner hired Realty Executives to manage the property and they filled out the lease with the current tenant. 

Lease Option to execute?

One thing to note, if you want to raise rent, then you need to execute year lease.

I am actively making moves on executing my plan, and I am looking forward to hearing from anyone willing to give advice to a new-by like myself, who is trying to break into this business.