It's good that you have two ideas to start with.

The guest suggested re-visiting this list every three months, or "quarterly".I know that I heard of the idea on a (recent?)

The core principles in The Book on Rental Property Investing still hold up, but higher interest rates definitely change the game.

.: The hate for wholesalers on BiggerPockets is insane when there are still genuine, good wholesalers out there who aren’t selling a dream.There are good wholesalers out there, but unfortunately, there are also a lot who have no idea what they're doing and some that are just scammers. 

Or is just the same to talk to the property manager and pitch the idea of a rental arbitrage?

I can provide support of checking in on contractors, staging rental properties, walk potential leads to give you an idea of the property in person or what the area is like, meeting with agents, and drafting scope of work for projects. 

Quote from @Francisco Pila: Quote from @Heidi Xu: Investment Info:Small multi-family (2-4 units) buy & hold investment.

Get an estimate from a GC to get a good idea of what is required.Market Comparables: Check what similar-sized homes with finished basements or additional bedrooms are appraising for in your area.

Neighbors dog at one point jumped the fence and bit our little girl riding her bike in our driveway, neighbors constantly argue in their front yd cursing, loud music until 11pm at times during summer months just to give you an idea.

It's a good idea to consult with a real estate attorney to ensure everything is legally binding and clear to avoid future disputes.