It only happened once, so you have no evidence that this is anything but an honest mistake that's been corrected.The bigger concern is the 583 credit score, because it shows a pattern of financial mismanagement.

Gather as much imperical evidence as possible. 

From anecdotal evidence, there are many more 'Gurus' flogging USA property to Australians than the other way around.

How can I effectively gather evidence to support my eviction case, such as documenting the disturbances, obtaining witness statements from other tenants, and documenting the tenant's interactions with my son?

They think their money or whatever overwrites facts but yes logic with evidence is tough to accept.

There are occasionally opportunities for grandfathering if there is evidence of legally established conversions that were done previously, but no permit records exist to show it was done. 

Quote from @Chris Olandese: Stop expecting her to respond.Post a notice on her door and take a picture of it for evidence.

If the smell comes from her apartment only, that's evidence enough.

It was declared a Ponzi after some very smart investors are united together and gave evidence to law enforcement.Funny we got our investment back 97% up to this day because the asset is the single family and the value keeps rising.Now we have so so-called real estate company that re-invested investor money into another high-leverage business (outside real estate), if that's not a scam or high-leverage ponzi I don't know what that is.

.), and you've made your House Rules clear, then don't sweat the small stuff.By that, I mean- you'll have guests who have 5-star ratings but can still leave a mess or damage (other owners didn't report accurately or it was complicated) but you have recourse via photo evidence (your cleaners, etc.) to ask for reimbursement (or use something like AirCover, etc.).