over 20yrs prepared and file my own returns, but financials became more complicated so I had to turn to an accounting firm. 

and knowing it is about $4K to remove the tree, does it still make sense financially to buy the house?

4) any Charlotte based resources that come recommended to help me structure this properly?

The reports feature allows you to see the property financial condition and profitability quickly and at a glance.5.

The last method seems to be the most practical for me if I can just get the right deal and makes the most financial sense to reduce my overall expenses in the long-term.

The last financial advisor told me securities based loans are close to a conventional loan's rate.

Sourcing and acquiring deals these days is a little more complex than several years ago, depending on your connections, resources, etc. 20% equity hold for all of the work you'll be going sounds slim.

Do you have any recommendations or resources that I could look to in order to learn more?

It's best to consult with a real estate attorney or financial advisor to understand all your options and potential implications.

Validate your financial metrics again.