But if you don't mind playing at the amature level and just want to squeeze every penny out of the seller and don't mind lose the deal, then you can sure ask everything you listed and the seller can either counter or worst case decline your request and walk away. 

I recently applied for an investment property and it was declined from lenders because of low credit score. rocket mortgage was asking for above 680.

Declining an applicant because of family status or number of children may be challenged as discrimination, unless you have a valid reason (e.g. more people per bedroom than the code allows).

I have been investing for 15 years and have never purchased a property where there was a probability of large declines in value...even prior to the last recession. 

I would want to see at least 3 years sales history to see if sales are going up, stagnating, or declining.

The political environment is a bigger risk to landlords, but Minneapolis has shown restraint, and the demand for rentals in Minneapolis is such that it will take a very long time of declining population before a small landlord who cares would have a problem.

The greater Austin metro had a larger yearly decline of 7% to a median price of $460,000.

They offered incentives if they I give them a break on rent which I declined and suggested to pay full rent and no need for incentives. 

“The speed of the decline is always going to be uncertain,” said Andrew Hunter, deputy chief U.S. economist at Capital Economics.

At a very high level, most economists would tell you that prices will not decline until supply catches up with demand.