Do I have to legally disclose to my boss that I will have my sales agent license and have a brokerage sponsor that is someone different outside the MF development company?

1) Yes you have to disclose.

They are designed to protect the seller (I have disclosed this), but not to substitute an inspection by the buyer.Sellers can only disclose what they have knowledge of.

But this can be used to sue you if you don't properly disclose so I would disclose everything 

It is about disclosing the scope of the rehab.  

If the Investor does not disclose to the seller how this process works and the Bank calls them yes you will have a mess and may be hard to undo. 

I’m looking for insights on which states allow you to list a property on the MLS as soon as you have it under contract—but before actually owning it.I know that some states have strict regulations around wholesaling and marketing equitable interest, while others allow it as long as you disclose your intent.

I would clearly disclose it in your listing.Someone could show up with a Service Animal without disclosing it.

You will be asked to disclose this during the application process, and not doing so is concealing a debt and would be fraud. 

Lots of times you will have people complaining about noise even if you disclose it on the listing.