Are you more of a sales minded guy, or are you naturally a systems person?

(still a good option)Bandit signs can also be pretty cost effective but just be ready to hustle and put these signs all over town (not a big fan of this approach, but I know many wholesalers get massive deals from these) In the beginning I had more hustle than money, so I hustled more using cheaper marketing methods such as these.

We purchased 3 rental properties using the BRRRR method on our last purchase.

It does cash flow better then a SFH, you are correct.In my case:- it had to be re-zoned as MF with the city- an additional post office address had to setup (1A, 2B)- natural gas line was split and 2nd meter was added- 2nd electrical meter was added outside- 2nd electrical circuit breaker panel was added in the basement next to the other panel, and all the wiring for upstairs unit was moved into it- city does not allow for a split up of incoming water to add 2nd meter so both units have to share it.

It just seems to odd to a novice that this one singular method would be singled out.

What cities (or areas within the city) have you seen hit a nice sweet spot between cashflow and natural appreciation, and why do you think it's a good opportunity?

It's nice just sitting back and collecting interest instead of running around meeting with sellers, contractors, title companies, etc.Yes i found this a very natural progression for many investors.. almost all start out with rentals.. and over the years they just burn out of them.. but want to stay in real estate understand real estate and then morph to the debt side instead of the equity side.. but believe me when a loan goes bad you do have your work cut out for you.. and you can for sure lose money.. 

As for the investment cycle term, thanks to their non value-add nature, you have to hold for the long term in order to recoup transactional costs and the slight decline in price once the 'new car smell' from the TK provider's renovation wears off.

Paperwork, legal matters, taxes, things of that nature.

Since you do not occupy the home you could buy another Primary with 3-5% down and again use the BRRR method.