Using any systems to manage the call influx, data tracking, etc...?

@Kenyon MooreI use the data from the tax assessor to do direct mail

These typically fall between 6-9 depending on who is evaluating and which parts of the country they derived their data from.  

The MLS is VERY valuable for housing data and what is selling in a particular area, sales is the lifeblood of any Real Estate Investors business also it's a very good lead source and you can figure out what the market is doing as well.

But, as with everything don't lay all your eggs in 1 basket. try some other forms of advertisement, like Facebook, twitter, Instagram, craigslist, for example I don't have a lot of FB followers on my business page but, it get's me a lot of clicks to my website with a $5.00 boost campaign where I can collect data from buyers and sellers.

I personally like Listsource because they have some of the best, most reliable data out there.There are a number of direct mail options out there if you want to outsource.  

I can't say for sure but the MLS data is just compiled from the public records and that is going to be how most of these list generators will get their data.

At the end of the day, they are taking ZERO risk when you buy that house and frankly you look at the deal totally differently when you're the one at risk...as you should.I would carefully search out all my own comps and wrestle with the data on my own.

Again, that wouldn't fly in NYC.I mention NYC as a central point because I don't mind exploring Jersey, Connecticut, Mass.

someone please correct me if I am wrong)  I am able to search properties by address, owners name, parcel etc and look at recorded data, and I am able to look up tax information and past sales info (to a certain point at which they began electronically recording them I believe).