I know there are a tremendous number of factors such as seasonality, pickup, quality of the listing, etc. but I'm currently working on going through things to put pen to paper to write out why.All that said, Pricelabs (the tool I currently use) has recently added a feature to their dashboard.

Successful franchises have a system of doing everything, you don’t have recreate the wheel just follow the system but you do need some starting capital.7 Delayed GratificationNow, if you earning more income, do not upgrade your lifestyle.

For cash flow, you need to factor in more than just the mortgage. 

That is what a 3% vacancy factor is.

As in one of the comments, apart from geographic location of these lands, other social factors can determine the growth of real estate to mention, literacy leves ,GDP , urbanization, government policy, political stability and the like.

@Jacob Maes I know that some investors cash flow fine with condos in certain areas but it isn't something I'd be comfortable with because of all of the external factors that could be at play.

I'm more interested in accumulating a lot of doors than having a flashy lifestyle; I use the money to buy more properties.My brother, Joe, told me how he puts money into a Vanguard charitable fund - the money can't be removed but he can donate to charities he likes - and I want to do the same so I'll be putting some money that would be going toward taxes into that instead.

I think reading the 12 week year and having 1 goal for business, school, and lifestyle is a good place to start.

ValuePenguin is a good source for the relative cost of insurance by state.Investment TeamAfter location, the most important success factor is finding and working with a good investment team.If you needed surgery, you would not start medical school.

However if you draw on the line, the payment will need to be factored into your DTI calculation for the purchase.