Milestone preparation

What has come from a simple idea has just got complicated. I am looking foward to doing my research and getting into the nitty gritty.
My first realization. *Clicks on real estate in boston* *over 600 properties for sale* HOW MUCH SHOULD I DO? how often? how long will I be missing anything? 20 properties? 3 rooms? thats 60 rooms full of space? ITS GONNA BE A ROUGH ride but im up for the task.