.- Rent Ledger and payment history from the online payment service to track rent payments- Email correspondence between Landlord and Tenant regarding rent and maintenance on the property.Already had the hearing where the tenant showed up and disagreed that they owe rent. 

You could look at the prices online before they are booked.You should get a monthly report after the end of each month.

@Andy Rousch, QuickBooks Online does the trick!

Can I just find a WA state attorney online and get the agreement reviewed?

It's the scam sales funnel 101 that you read about online with old ladies spending their last dime on some "guru".4.

Report them on every online consumer protection organizations and spread the word before they scam more people 

He's also a very good operator from what I've know and seen as he does share content online (walkthroughs of the aftermath of fires at his property, etc).

We just got it online in March and have had pretty consistent rentals, but are doing more direct booking than with Air B&B (through networks). 

Wondering if you have any particular online companies you recommend that checks evictions, credit reports, collects rents, provides a lease, etc... all in one place. what are some of the pros and cons you have experienced with each company. thanks

Check out other online guides available here: https://www.biggerpockets.com/guides3.