1. take a web application working in somebody computer since 4 years with tons of features.
2. Believe that the application is the future and solve brilliantly a general market need.
3. multiply income of current only customer by 10: you are going to be rich.
3. start to install 2, 3 customers.
4. discover the application is shit. Doesn't solve well the problem. Functionalities are different for each customer
5. discover that customers are willing to pay 1/10th of the original customer
6. quickly reingeneer the application to a multitenant cloud application, because with 3 customers and different versions you are already in deep shit
7. keep giving away the application for free to flagship customers. With a lot of customisation developed for free.
8. reach 200 customers in 5 years and still no break even, but lot of debts
9. resort to financial tricks to keep the company going

Luckily money are not mine. They could be recovered.
Unluckily the time spent was mine. It couldn't be recovered
Hope that the application will finally crash so that I can move on to the next thing: retirement in a mental asylum