Spend at least 2 hours per day researching online about your desired investment strategies.

Also go online to loopnet and crexi and look up similar properties to lease.  

I’ve watched a lot of videos on how to screen and how to set up work with contractors, so I’m hopeful to build those relationships more in this area in the future.Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Now I found one that specializes in real estate investors that was recommended by an online mentor.

Have proof on hand (easy enough to find) online of the missed tax payments and any documentation that supports that he specifically didn't pay his taxes.Probably a simply mistake on his part, but now if he wants to develop on it, he either has to land lease it from you or buy it back.I'm not sure how the whole tax deed thing works, so that would be something you have to figure out between the two of you.

Check out other online guides available here: https://www.biggerpockets.com/guides3.

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.

you can find all the info online"...it's like, no sh*t you can...all the information ever is online!

A national buyer would review the BPO and maybe do some brief online research, but would not typically not know, as in your example, about the sewage issues or extent of interior rehab needed.

He was very successful and wealthy before he started making videos and created a course.Does his course teach you to build a successful business or work hard at a W-2, earn a boatload of money, and then learn for free through a mentor like he did?