Make sure your contract provides you with permission to market the property, which includes marketing on the MLS. 

This is almost aways permissible as a source of down payment funds.

Then I called my agent and explained that I had never given permission to sign over her quote to anyone else and that I could send her anything in writing and would prefer to go with her quote.Escrow happened to be delayed for other reasons, so I have some wiggle room in trying to sort this out.

Sub-to without our permission increases our risk.

I communicate with owners when there's a change in their income stream or when I need their permission to do something.

To me, the Agreement’s 1% clause implies that an outside sellers agent is permissible. 

This process can be very costly, requires zoning permission, in addition to all the items you listed.

So if you want to buy a house to live in as an owner occupant, you have to get the tenant's permission to buy it (and to sell it).

PHYSICAL CHECK = If you have permission you should physically check the property prior to the sale or have a professional inspector.

My company leases a property from a private landlord in Glen Ellyn, with permission to sublease.