Potential duplex

[Darrel Maxam]

I currently am purchasing a 3/2 that has been completely renovated. In the 80s it was a duplex. The city records still has it as a duplex. Here is the kicker! This current 1 level ranch sits on a basement that was once the additional apartment. the investor abandoned the project due to lack of cash flow. I am buying this property to convert it into an Airbnb. Since the basement is unfinished currently I foresee putting in 25k. The top unit will bring in 2700 monthly and the bottom will net 2250 based on the lowest occupancy rates. I got these figures because the home is in the same area as my first home where I make better monthly returns. My question is that can I turn the basement back to a duplex? If I am not allowed to by the city , there is a better reward than the risk (even with a hefty fine). Once the basement is converted to a 3/1 can I then resell in a couple years as a 6/3?