[Thrall]

It also depends on the amount of revenue you can generate if you hire a professional and get on with your work.

If we assume that the professional's fee is constant (doesn't depend on your income), then someone with very high income can waste only minutes on the task before it would have been cheaper to hire a professional, whereas someone with low income can devote a few hours to learning how to do it themselves and still make up for lost earnings by avoiding the cost of hiring a professional.

[gbog]

You an other comments seem to only balance cost and time lost, but doing your own curtains, for many people, is also fun, rewarding, interesting, and a very good way to change focus from professional or personal issues.