Does anyone have experience with this method, within this region?  

Use the enemy method! 

Seeing with eyes and staying there a  few days would help, also check out using enemy method and also Facebook groups

I still feel the best method is asking other real estate investors in your market (which he does mention in the article). 

Even if the property were absolutely unique, there are still methods for valuing property that a REALTOR or appraiser can help with. 

It's interesting to see how these different methods might apply in a real estate context.

I like the BRRRR method and think I can use that strategy now with the 1 rental property I have. 

Some say "in writing" while others may specify the method of writing (e.g. certified letter).

I'm curious, from your experience, which method do you think yields the best results: cold calls, sending out mailers, or door knocking?

I spoke to a guy last night the guys down payment and monthly and a womans just in January was way different good way . one part I found interesting on top of all the systems etc was that they cover earnest money deposits too..others more costly , no monthly payments , skip trace system they will cover closing costs ,inspections etc but not earnest money..I get tons of good deals from wholesalers plus other methods ..that was huge to me..I didn't see earnest money in agreement though .