So, I took them if they proved they were full-time students, although, I tried to avoid them just because they cause noise and damage.That was probably more info than you wanted lol. 

Downstairs room tenant was out living in hotel for last 4-5 days as noise of these machines is too much. 

But IMO if 40% of rent was not being paid widely there would be a lot more noise 

The reason is because if you have an apartment building with multiple tenants, it's easier or more accepted that when you're a tenant in that building, you expect to have the noises that are normal for living in a multi-family building and are prepared to kind of blend in - it's more anonymous.In a duplex, it's more like having to get along with a roommate that you can't kick out.  

The place smelled of pizza & the noise & heat from below was terrible. 

Use your common sense and critical thinking to eliminate the "noise" (wrong/not practical information).

Howerver, I have resrvations about how this will impact the community's living standards as the development will immediately border some neighborhoods and could bring unwanted environmental impacts and noise. 

Ive been doing my dueldillengence and trying to studying up on market trends, but everyone is saying different things and it hard to block out the noise.

I don't know, I look at these places and don't get me wrong they're nice, but 300K seems just too much for the square footage, hence I can hear the bubbling noise ;)

There seems to be a lot of people against them, mostly because of parking and noise issues.