There are a few decent videos online but they are general.

The best way to determine value is to take a look at the property (or get videos) and run comps online.

A lot of the online calculators will automatically input 5% for both capex and maintenance and then you can usually edit it if you use a different number.

In case you're wondering, I bought the Apke Brothers course Land Investing Online.

Honestly, get on-line and read, buy a book, or talk to a knowledgeable person and you will be further ahead.  

I briefly looked online at Elk Grove, parts of Citrus Heights, and West Sacramento (near downtown).

I don't engage in online shouting matches. 

Petscreening will ask the appropriate questions to ensure the applicant is not using a fake letter or registration purchased online.

Not the $5000 houses you read about online. 

@Tricia O'BrienI spoke with Chrissy from Moxie today, she said all the right things, 300 properties under management, team of 4, online payments, low fee for placing residents and reasonable monthly fee.