Before you jump into some type of mentorship (that they usually want you to pay for), I would start doing some meetups in your area with local real estate investors. 

can you invest locally instead?

Starting locally with multifamily and house flipping is a solid plan.

Keep in mind local zoning laws and market conditions in Portland versus Salem—Portland might offer higher rents but stricter regulations, while Salem could provide better cash flow opportunities.Your design approach has proven successful, so continue focusing on appealing upgrades like kitchens and bathrooms, but prioritize cost-effective and durable materials for rentals.

Get out and rub elbows with local investors by joining a local real estate investor group.

Rodrigues is an awesome LOCAL lender, who works a lot with foreigners.

These malls took out Mom/Pop local stores. 

Check your local/state law.

If your local municipality has an online court records, go to their website and look up both criminal and civil histories.

Selling a property that requires significant work can indeed be challenging, but there are several avenues you might consider exploring:Local Real Estate Agents: A local agent with experience in selling fixer-upper properties or historical homes in your area could provide valuable insights.