BRRRR investing with traditional financing

[Cameron Maples]

I've been using the BRRRR calculator here on many properties and the purchase price has to be extremely low, for example, I found a property for $180k and the offer we submitted was $91k and was denied with a rude response. Even with that price difference the cash flow would be around $100 a month. Is this because of the traditional financing or is it just because rents are too low in the area? Would love some feedback because after running about 50 deals in the same way I am getting either the same number or sometimes negative cash flow.