The only issue with seller finance and resale is if they don't want to receive a payoff in short order, then they should include a pre-payment penalty. 

Either way it would be a grey area, selling a house with a different amount of units/bedroom/bathroom seems extreme though. its an auction site, I have seen auction sites miss the fact there was additional lots in a sale.

I rented out the additional bedrooms to friends and family, charging them well below market, and sold when it was time for my wife and I to start our own adventures.

With pictures and guides to anything that may be helpful for the tenant.If so, how was this received by the tenants? 

You said in your post  "If the notice was delivered by mail then the notice period begins when the Tenant actually receives the notice."

I rented out the additional bedrooms to friends and family, charging them well below market, and sold when it was time for my wife and I to start our own adventures.

Additionally if you find this post helpful please give it a vote on the right hand side of this post.

I've already received some great feedback here so far, which i gratefully want to thank you all for!

However, i'll likely be looking at additional ways down the road to be even more secure for a backup what if scenario.  

Quote from @Jay Hinrichs: Oregon finally passed legislation to reel in unlicensed wholesaling its in this months publication from the state RE agency.Highlights:Goes into effect  July 1 2025Requires:On line application to become a licensed wholesaler  ( RE agents exempt from this of course they already have licenses)Name of company and individuals who will be performing these services.Each one needs a full criminal background check and approval prior to receiving the license.300.00 annual fee for the license.Written Disclosures in Bold 10 point.These must be given to Buyer and Sellers prior to entering into a wholesale contract and signed for.Also RE brokers assisting wholesalers need to give these to potential buyers and sellers.