Part of what you are describing is what they call an installment land contract.

Last I checked they don't allow ADUs legally that aren't fixed, they want to see foundation for it to be rented out and considered an ADU. 

Prioritize properties with strong rental potential and set aside reserves to handle unexpected costs.Finally, familiarize yourself with tenant laws in your target market, especially in Portland, and consult a real estate-savvy CPA for tax efficiency and legal considerations.

My contract was signed by Natalie Bastin.

Yes it's definitely legal, and I've sold a few this way.

This also leads owners to ASSUME simpler is better when it comes to management contracts.

I did that (posted the notice on the screen door and took pictures), however don't know if it's legally served. 

While it might feel counterintuitive, it can sometimes save you the time and cost of a legal eviction.I’d love to hear from others in the forum..Have you found any creative or cost-effective ways to navigate eviction challenges?

They have a system, team, and their own contracts, and also provide proof funds, even the EMD. 

But the answer for everyone may differ.Here are the personal attributes I see in those able to achieve a higher than market ROI, enough higher to be able to “scale”.1- Knowledge of real estate principles, real estate law and real estate finance2- Minimum 3 -5 years full time, or near full time experience directly related to real estate investing3- Ability to utilize technology for increased efficiency, capacity, and accuracy4- Excellent hired legal counsel and excellent hired marketing help5- Established method(s) of obtaining consistently high QUALITY deal flow6- Ability to manage and choose people who are NOT employees: Attorneys, Appraisers, Mortgage Brokers, Real Estate Brokers, Title Companies, Surveyors, Marketing Specialists, Accountants, Contractors, Consultants, Property Managers7- A VERIFIABLE track record of success8- Ability to identify, analyze, and negotiate a deal that can be “worked” for “enhanced” ROI9- Some type of competitive advantage; for example for me it’s my ability to analyze and identify mortgage loans that are actually less risky than all other lenders believe (on the investing in debt side), and on the real property side it’s my ability to analyze”pull the trigger” with LESS information than other investors need,  combined with the ability to pay cash, or raise significant capital almost instantly as well as being able to obtain loans at the lowest prime customer bank rate with no recourse or personal liability.