I see a selection bias in your comments there. There may be numbers of people who manage to achieve it but you can't strictly say if it was difficult or not unl

I see a selection bias in your comments there. There may be numbers of people who manage to achieve it but you can't strictly say if it was difficult or not unless you compare the number of people who tried and failed. You can't say it was not expensive unless you can demonstrate that some significant proportion of those who made it did not spend much money doing so.