Make sure to have a separate bank account for business transactions. 

Sorry, but these are the costs of doing business.

The previous landlord had one for the property, obviously for his own business.  

They can be very busy these days...)

Opened up the tiny kitchen to the dining room...

I'm also a newbie and not confident in evaluating projects and borrowers, so would prefer to partner and diversify.I'm looking at debt funds at crowd funders like Fundrise, as well as business development (BDC) ETFs like Ares, Blue Owl, Golub.

1st you need your Seattle business license, then you need to get your RRIO, (the inspections are random and you'll be notified when youre required to do an inspection), after you get your Rental Registration application done, then you can apply for your STR license.

I don't have a current business relationship with the company.. 

Seems like this would make a great business plan if it was even possible

@Francesca Zanzucchi Most of the delay is caused by the banking-controlled ACH system. 48 hours is the common "promised" turn time, but our reality is 3-5 business days.You should look into the 10 day delays, as most payment software is automated.