How to turn a one-bedroom apartment with a living room and a separate kitchen into a profitable business? Just like this. We carried out a thorough renovation of an apartment in a tenement house, dividing it into two bedrooms and a micro living room, significantly increasing its short-term rental potential. The property, purchased for around 550,000 PLN and comprehensively renovated in 2023 (replacement of risers, electrical wiring, ceilings), has since been achieving an ROI of about 10%, and its current estimated value is around 1,000,000 PLN. Further proof of success is over 100 reviews on Airbnb with an average rating of 4.85/5 and similar ratings on booking.com.