And now his parents are selling his house and are set to close this coming Friday!

cite=11.04.015https://www.nolo.com/legal-encyclopedia/intestate-succession-washington.html In WA, the brother inherits the property only if the deceased was not married, has no living children, and no living parents.

I am not sure if it is correct or not, but I look at household income and when the adult caring for the parent took a salary from the parent's income I did not count that as income. 

I didn’t mention it, but I have had the conversation with my parents and they are definitely on the fence about it, as am I.

We are moving to the area with my older parents who would like to live with us.

I grew up in a house where my parents were always renovating a bathroom or building an addition, so at least some basic cosmetic repairs don't phase me much. 

The market crash caused so many to walk away from their properties and call it quits (including my parents who invested in AZ during the same time).

I used my savings plus a small loan from my parents to reach 20% so I wouldn't have PMI How did you add value to the deal?

Landlord requires possession of the rental unit because one of the following people wants to move into the rental unit:the landlord or the landlord’s spousea child or parent of the landlord or their spouse, ora person who provides or will provide care services for any of these people.Form N12 - Notice to Terminate the Tenancy at the End of the Term for Landlord’s or Purchaser’s Own Use60 daysTermination date must be the last day of the rental period or lease term.Form L2 – Application to Terminate a Tenancy and Evict a TenantTiming: Application must be filed no later than 30 days after the termination date in the notice.Application must include a completed Schedule B.The person who will occupy the unit must file an affidavit with the application.The tenant can dispute the application at the hearing, or move out of the unit on an earlier date if they provide at least 10 days’ written notice to the landlord.The person who receives care services must reside in the same complex.The landlord or family member must intend to live in the unit for at least one year.The landlord must either:1. pay the tenant the equivalent of one month’s rent before the termination date in the notice, or2. offer the tenant another unit that the tenant accepts.Only individual landlords, not corporations, are able to give notice of termination for this reason.If the tenant believes the landlord gave the notice in bad faith (e.g. the landlord rents the unit to someone else or advertises it for sale or for rent), they can file a T5: Tenant Application – Landlord Gave a Notice of Termination in Bad Faith

We're thinking through this with my parents house currently.The biggest deterrent from doing the equity loan is, as you stated, the immediate monthly payment.