I prefer Primary and Secondary markets because of the diversity of industries\jobs, higher population growth potential, higher income potential, amenities, and the data collected\available to analyze. 

For example if a carpet is done then it is typically replaced by the cheapest and often ugliest carpet available. 

If anyone is available....let's chat!

I've recently come across an interesting vacation home property with two cabins available for rent.

Here is an example of one property available in Stockton with better return and the price is now $384k: 

The calculators are not available on the app.

For residential, depending on what state you are in, there could be a board form available (check with your realtor). 

When is the property available to borrow against for a new purchase?

Step one: Acquire a single family home for 80% of its value then brrrr that property. step two: Repeat until the funds are available for a multi-unit then brrrr it.step three: By this point, I should have a network, I have deals under my belt, and the knowledge to invest into apparments.

These are actually available from the credit bureaus as marketing data, but they are "credit data" and therefore come with a lot of rules around how they can be legally used.