I love the BP calculator it makes my time more efficient, however with not much information in the listing and also my lack of experience, guessing for values etc is not very promising.

It also is efficient to analyze multiple properties.

Even just starting out, you want to develop habits that will make you efficient with your time. 

@Nolan Sanburn, I go by the headache factor.  I

All of these services help in the day to day efficiencies

This is why\how I came up with the number of 16,000.The question lies with, based on the collective groups success, what has been your best and most efficient way in obtaining these mailing lists based on a targeted geographical area and\or demograpgic? 

The limiting factor is speed/time since you can only do one at a time.

.- What processes or systems had a dramatic impact or that you'd suggest to improve the efficiency of your daily monitoring, maintenance and performance of your portfolio? 

But overtime get more efficient with your SFR investment by coming up with a better property management model, eliminating expenses, decreasing vacancy, and increasing income. 

Newer valve devices are also more efficient than the old floats.