Has anyone used the online auction system? 

@Randall E CollinsIs there a certain assignment contract to use in Texas or just use a generic one that I find online ?

Are any of the Arizona counties auctions online? 

This will be determined by normal market supply and demand - and researched through property managers, or various online tools that all seek to understand comparable units for rent in any given neighborhood.3 - there is no "right" way to calculate return on investment (roi) - it varies with the property type and your investing goals.

Some of the liens you can view via pdf online, and other liens you are only able to get a copy of in-person at the county building.

Quickbooks is pretty standard and they can refer someone online to set up what you want.

Unfortunately, there are many online companies hiring clinicians to write these letters.  

So unless you're going to call and say "hello, I would like to put 25.09% down on a home purchase," the terms/fees/apr/etc advertised aren't applicable to you and need not be honored (it goes without saying that "Joe Consumer" isn't going to click on "legal disclosures" in size 5 font at the bottom to read the below snip, so "Joe Consumer" would never know that 25.09% is the magic code to get what was advertised).I could go on, but basically there's no way to advertise rates online and be honest about it.

From what I can find online, that's not unreasonable. 

Always do your research on a lender by checking their website, social media, online reviews, etc.