Gray's Ferry according to this novice real estate investor.Fishtown pros - proximity to major highway and transport lines, shopping of all sorts nearby and fair share of boutique pro chef restaurants and micro brew style bars, name already seen as hip and flippers proving buyers will pay a premium to move.Gray's ferry pros - major hospital and university expansion started just a mile or two away, prices still mostly accessible, near major highway and transport lines. cons: doesn't carry the popularity of fishtown and still seen by most as street-by-street, there's little or no shopping and certainly no restaurant or hip bar scene.My current strategy is buy and hold for the long term.

@Alexander Szikla This thinking is appropriate sometimes, but in this case the moose has already endured an avalanche.

Astronomically high housing prices but it's also an incredibly popular tourist destination so I'd imagine that the short term rental market would have to be the market to go after in Hawaii.

Brewerytown caught my eye as it is close to center city and in the lower part, it seems like there is less crime and gaining popularity.  

Scaling, I really like the thought of BRRRR but I wonder what other popular methods of scaling are being used?

Here are a few popular options:Zillow: Zillow provides real estate market trends and data, including information on rental rates, property values, and other key metrics for various neighborhoods, cities, and states.Rentometer: Rentometer is a rental market analysis tool that provides rental rate comparisons for specific properties and neighborhoods based on real-time data.RentCafe: RentCafe provides rental market data and insights, including information on average rental rates, occupancy rates, and other key metrics for various neighborhoods, cities, and states.Yardi Matrix: Yardi Matrix is a commercial real estate research tool that provides market insights and data on various aspects of the real estate market, including rental trends and property performance data.It's important to note that while these resources provide valuable data and insights, it's also important to physically inspect the properties and consider local market conditions and factors unique to each location.

One bedroom units are very popular and easy to keep rented to single people and/or couples, because they are usually a relatively low cost housing option.

DSCR is a more popular option since you do not need a job/employment. 

One of the most popular questions I get related to the BRRR is… Do I need to remodel the entire property to refinance my money out.?.

I think demand is determined by the popularity of the area where your rentals are located.