There is no downside to appealing your taxes and there is a very good chance you will win.

Is there an online platform on which we can do this or do you track this in a excel sheet ? 

Excellent points Frank!

@Jay Ritchie if you need to do this near Berwyn I have an excellent plumber who did this for one of my listings.

What this means is that if you see an HOA suing a homeowner, just because you win the auction, the property isn't free and clear - any superior liens will still be attached to the property.

What do these softwares - propertyzar, simplifyem and tenantcloud - have the ability to do that an Excel cannot?

OnSight Pros is an excellent company.

For analysis and etc excel would be best to use.

I also closed one another property in NC which is in excellent location and is doing good.

I have used Coach Carson's recommended spreadsheet from "Woman Builder" (linked), and it's excellent for listing all the various cost categories I may confront on a project.