The system we use is Appfolio, so owners get their own online portal to check the status of their ledger, review the inspection reports of their property, and have a bunch of built in reporting. 

You can see in the portal that the payment is in process.

Right now I use Cozy.co and it has been excellent for self-manging my own properties; however, as I add more units of my own and take on management of properties for others, I'll need to switch to a platform with features like an owner's portal and all the related reporting.

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This is more than an owner portal.

@Chen Tong I am still a Rook but to me it seems like there is no deals in Seattle, at least on the MLS portals like Redfin. I feel like most are getting deals off market.

As mentioned above, they have some of, if not the best, tech/portal out there.

Online portal and a good consistent follow up process that adheres to the lease.

We offer all of our tenants and owners their own online portal to take care of all issues.

At a bare minimum, you'll need someone (licensed agent) who can get your property listed on HAR.com, the local public portal for the MLS.