If she left the utilities on and her possessions were still present inside, you'd have a hard time making the case to a judge that she absconded.One "short cut" you could try is reaching out to her and explaining your situation with her still in legal possession of the unit and not paying rent to ask her to send you a "return of possession" notice (search it up online) to stop the accruing charges to her. 

I understand I can use the different EINs to setup accounts for each child LLC but looking more for recommendations on whether there are banks in and around Washington state (or online banks in other states) that allow having Primary-Cell type accounts where all accounts are housed under one roof but with the ability to have different EINs.

Most of the big stuff never gets listed online.

That's why they are agressively promoted online and through social media. 

Easier to meet local people at REAs and connect doing the same thing as opposed to networking online.  

do you purchase these online or at a store

You can also check their reviews online at Google, Facebook, or Yelp.

@Marquez Cadet  wrote      "but I'm out of state so its a bit tough to go to the Meetups at the moment"Most investor groups have an online presence.

You can also check their reviews online at Google, Facebook, or Yelp.

You’ll get real insights that you won’t always find online, and it’s a great way to start building relationships with people who are active in your market.