So a survey and ask: how much would you pay for a furnished bedroom: Go to ikea.... or anywhere else and do inventory of how much you would have to spend?

You won't be able to come up with much until you go there and survey the place, call other business operations and investigate the market.

Freddie Mac publishes a weekly survey of rates from around the country.

But rental is assumed so you get the credit or extra income based on Appraiser survey of local rents for similar homes to get the mortgage approved.

Sales price is disclosed in the MLS, it can be disclosed by the buyer or seller in the sales survey(I have never returned one but people do) or it can be disclosed during a protestThere is no law that prohibits disclosure by any party

Also, when our tenants move in for our PM company, we ask them several questions via a survey, one of which is about the price.  

I've had a few investors ask me for a survey but I've always seen this as part of the end buyer's due diligence. 

It does not look like I'll be able to get a survey in time for the closing.

Then go to two more doors down from them, so nobody gets suspicious.If anybody asks you who you work for, tell them its a company that does door to door surveys, you don't really know who the customer is that requested the survey.

If you are willing to pay a subscription for additional features including prequalification surveys and mobile applications, bulk messaging, and a built-in calendar consider testing RentRedi.