83 year old in poverty needs caregiver. How does he get it in Bonney Lake Washington?

WA State Dept of Social and Health Services, Home and Community Services section. You can do an online application and then be evaluated for the care needed and financial eligibility for a state paid caretaker. Happens all the time.

Pierce County Area Agency on Aging website
https://www.co.pierce.wa.us/2128/About-Aging-Disability-Resources
Contact Us
Community Connections
Aging & Disability Resource Center
Ph: (253) 798-4600 or (800) 562-0332
Office Hours
Monday - Friday
9 a.m. – 4 p.m

Whoa--my son lives in Bonney Lake, WA! The Medicaid system in WA is really huge and I bet through that you can find care. I would look up "health care for Medicare patients" and go from there. Or call the Agency on Aging.

I do not know the steps you have to take, but you have to qualify for Medicaid, so get the process going sooner rather than later.