They could have chosen a different number, but one month makes sense because short-term renters tend to stay for days or weeks, not months. 

Tax accountants (and lawyers) also tend to be extremely risk adverse so they tell you to do one thing after another to lower liability even if it doesn't always make sense from a cost/benefit way of looking at things given that, as we all know, time = money. 

They tend to have a passion for this career and are possibly long term tenants in the area.

Propstream tends to be the one most people use but Dealmachine has some amazing data that propstream doesn't. 

The tenants we typically get under this business model tend to be workaholics and they rarely complain about much (so far) so I haven't had any issue.

MLS will give you some, but you can look online to the City's website for the City owned real estate they have for sale, but those tend be up to highest bid.I wish there was a catch-all answer to this question, but there really isn't, because it depends on several factors - like what's your price range, what are you looking to do with the property?

One of the "hottest" apartment building cities in the country which FLOODS supply and many young renters tend to go for class-A apartments and their amenities, which are seeing concessions in lease-up.

The homes selves also tend to depreciate and not appreciate so you could find yourself overpaying. 

Many duplexes are  built this way in North Jersey but legally converting them tends to be an up hill battle.

What tends to work, watchouts, etc...Thanks in advance!