If yours is the only STR within 20 miles and there aren't any cities or larger towns within a 20-30 minute drive, you could easily run into trouble even finding a reliable cleaning person, let alone a full-service STR management company.I would also definitely take the time to find some comps on Airbnb in the same area as yours, with as close to the same bed/bath count as yours, and with the same finishes and amenities as you are planning to put in yours.  

I guess they did not clean the unit for over 3 years and did not call the old property management company when things started to break. 

Guessing it's really just a bit of wall cleaning and touchups.

Also if you have a clean unit the new owner will be excited about the idea of renewing your lease. 

Can they be cleaned enough or is it replacement only?

With similar 3 bed rental bringing in between 1850-2000/month and a refinance value around 250k this is one of the cheapest things in the pocket that is this clean.

If you have carpet consider a cleaning clause if you don't have one. 

If they see mold spots, they should clean it immediately.

For example my nightly minimum is $200 but its listed for $340 a night on airbnb before the cleaning and booking fees are added in other words, i the property, owner get $150 per night from airbnb, vacasa takes $190 per night from airbnb and then charges fees. 

I had a case when needed to clean the coffeemaker and did it during a couple hours, or organized the TV replacement with a new unit in less than 4 hours.And Bremerton is a bit of an hour drive but totally doable for me for managing, and will definitely have a local cleaning team and handyman.