I've been on the scavenger hunt trying to find it, county site has a summary only.

Cash flow a must, appreciation a plus.

Just trying to find out more and better ways of doing everything and moving my Real estate game up. 

To thrive in real estate investing, you must maintain a firm grip on your finances.

Gutters are a must, I would highly recommend installing them on your property if you dont have them already.

For existing properties, you must make substantial improvements (equal to the property’s value, excluding land) within 30 months.Ensure the duplex qualifies as an OZ investment and complies with QOF rules.

Must have tools: you need some type of evaluation metric and/or tool that you are comfortable with and are willing to walk about from a deal if it doesn't meet your requirements.also, a deal is a term for a transaction, not to be confused with a "good deal".

https://www.straightupchicagoinvestor.com/blog/6-must-knows-...

I'm surprised someone verbally told you you can convert back to a duplex and didn't tell you that you must get permits.from what you are describing it seems the town gave you a hard time because you didn't get permits, I don't know that you have any legal standing to go after the town,  again, I am not an attorney 

Has a massive stand of desirable trees (hardwood would be a must) Oak, Maple, Walnut foresters wont even bother unless you have acres and acres of harvestable trees.