Google ads and Facebook ads.I hope this helps.

Search on google and your state and "white paper" on tax liens.   

---So, learn the neighborhoods where you plan to invest and use Google Streetview to virtually explore them.3) Poor Tenant Screening - they typically can't sell a property until they place a tenant.

As far as you saying you don't know if it's in an HOA, it likely is, given how you described it and that shouldn't be hard for you to figure out just by looking at a Google Earth map (sometimes the name of the community will appear), or pay a local person off Craigslist to go drive it and find out the community name, take pictures of the lot, etc. 

In terms of the actual *mortgage* county tax, if you google NYS Mortgage Tax rate form MT-15, you will find a several page document that will highlight your tax rate depending on which NYS county you're purchasing in. 

Kroc but a quick google search and you'll get the idea. 

Yelp, Reddit, Google.

We use a Google camera at each house and have great experience with them.we own two side by side beach houses in Myrtle Beach.

I'am using the BiggerPockets calculator, an app on my phone and I just googled random calculator to cross check my numbers and I'm getting 3 different calculations.

I actually gave feedback on a google search result yesterday, saying it was inaccurate and citing the irs.