I joked on another post that I should start a cat tree flipping coaching program (buy cat trees on Amazon then renovate them with top of the line cat toys and decor (Disney theme, bird theme etc and charge more, which is the flip)...someone might actually pay for it lolI agree with you there agents who are licensed and not competent, I attended an open house here and the agent didn't know about non-QM financing.

(It is due to a tree that the city grew and will need to be cut down immediately to remediate the problem). (12k for the replacement of pipes and ~5 kfor tree)

And if you think the tree situation on the lot needs to be dealt with getting some bids beforehand on that chore would be a good idea too.

We are curious if we should build multiple campsites, which would include a lot of tree and brush clearing, and likely a bridge across the creek.

In addition we removed the tree that had grown into the line. 

Made from solid logs from the now-extinct Chestnut tree, wood floors, and original rock fireplace.  

Next year the crack was wider, so we tore up the concrete slab and cut the tree root underneath.

He immediately came back and started throwing large tree branches and other stuff on to my deck. i called the police a second time and they came and arrested him and gave me the report number.i have a security camera video of him throwing the brick, walking in and out of my property, screaming, and throwing the branches.what do i do to protect my workers and not lose my investment.

This is the second best time to plant a tree...don't wait for things outside of your control because you'll be waiting forever. 

It's a risk with possible damage to the structure from trees falling,  but roofs are the main risk.