That stigmatic mindset and ignorant attitude is a huge part of the problem we have here in this country.I lost my younger brother to a heroin fueled suicide.

Ignore him and I would interview more than one.However, I would try to work with a team instead of all-in-one. 

Then ignore it!

You and your husband were very smart to ask Open Spaces good questions and not ignore the red flags that surfaced through the process. 

...if you have hundreds of thousands or millions in reserve, it might not be an issue  ...but if you only have a few thousand, it will be a major problem.Now, having said all that, there definitely are scenarios where a structural issue is an easy, relatively cheap fix. ...and, there are some examples of settlement that can be ignored--for instance, minor settlement on a 100 year old house is fairly common, and might not affect the structural integrity of the house.But, again (assuming that you're not a structural engineer), you don't know what you don't know--it could be five hundred bucks and a weekend of work, or it could be a hundred thousand dollars, a year of your life, eight months of vacancy, and ultimately bankruptcy. 

Is this something we should be concerned about or do we just ignore and just wait until we hear back from them?  

Should I agree or ignore them just keep trying to sell it? 

It sounds like they're just playing around and ignoring you.

(No plastic parts like a bathroom fan.) other than that go with quiet (so they’ll use it.) and wide range of CFM (low/slow/quiet to leave on and ignore.

This is the simplest method, but it also means your tenants are more likely to abuse the utilities by leaving windows open with the heat or A/C running, leaving lights on, ignoring the toilet that constantly flushes on its own, etc.3.