Is there a specific search filter that works well?

For example she starts dating a carpenter or a handyman type (or even worse a wannabe carpenter or handyman) who moves in and does work on the home and claims they should have equity too for making those improvements.

Thanks Anthony, solid idea to improve efficiency.

If anyone wants to meetup with fellow investors, just do a search in the meetup website.

And while someone paying a professional to do a detailed and relatively costly search may be able to ascertain your wealth status; a superficial search would probably leave the potential plaintiff believing you lacked the assets to make a lawsuit worthwhile. 

Once I had a few in mind and was working with a realtor that understood my target market, we could narrow down my search results. 

You don't have a great case for a tax appeal here because it looks like it was upped based on the renovation and improvements done prior to you buying it.

You can also find real estate investing groups through meetup.com, Facebook, or a Google search.

I wouldn't necessarily put a lot of efforts into improving/building/spending in hopes of staying booked solid, but it is a nice 'side hustle' for a pretty piece of land to bring in some extra income while it sits. 

If you search agents in that area on Zillow, there is a box they can check about working with investors and that will come up in the search.