If this is an older home, the 12 month expenses of $1430 does not appear reasonable (the actual may be much higher).

If you sue, and have to "prove" that the neighbor was negligent, then that would likely need to consist of multiple “written” communications from you, the city, or an arborist to your neighbor stating that you/they feel the tree in question is diseased, appears to be dead/dying, is overgrown and posing a potential threat to your property, etc.

I'm sure it's hard to find, I'm sure there will need to be some luck involved, but whatever, I'll be patient and see what appears on my radar. 

I have an old military buddy that did it and it appears he got a lot out of it and is now making money in real estate.

@Orchid DjahangirianIt appears a few clarifications are in order here.1.

Not saying there isnt any but when they do appear, they go fast and cash buyers prevail.

Sure the site is a little out-dated in appearance but it is so user-friendly and although it isn't my highest producing lead source, I do tend to get very strong leads from there and no spam so far. 

Apples to apples, they appear opportunistic and taking advantage of someone who is green. 

Quote from @Kar Sun: It appears the law requires you to allow them to attend, inspect together, and mutually agree to a list of damages: https://codes.findlaw.com/tn/title-66-property/tn-code-sect-...Print that off and follow it.Make it clear to her that she is not permitted to bring guests.

I hope everyone scammed here is able to recover at least some money; however the subject “guru” appears to be quite adept at dodging responsibility and consequences.