A warning note over employing staff though
You really do need big paying work, if you've experience with employing people then you will know what you are getting into.
Employers liability insurance is
very expensive, the costs are really quite extensive.
Taking someone on in a self employed basis is very risky, get caught out by the tax man and he'll happily empty your bank account.
If you've got what it takes then the sky's the limit, one man can only earn so much money, so employing staff is the way to turn over huge sums of money and earn yourself really serious money.
But it isn't easy.
roger was quite right about the window in question, but parts of the frame have been tacked on, it's a bit of a ramshackle frame when you look at it closely, not many wooden windows are unsuitable for WFP, and as Tosh has said, stick with them, you may well figure out a way to get the job done to an acceptable standard.
The conversion is worth it, big learning curve involved, but life is easier, safer and more profitable, how much so is down to the individual.
Ian