I think as others have said you're best to cut down your usage before you attempt something like this.
Quit folding, or at least reduce the time spent doing it.
Then stop washing everything every day. Seriously this is just wasteful and unnecessary. There is no way you need to wash everything in the house every day. Even with bad eczema you could wash things every other day and your bill would be cut in half. I really can't believe it makes that much difference and it's possible that excessive washing in the past caused your reaction anyway. I also don't understand why you need to sterilise things because Eczema isn't caused by bacteria.
"The hygiene hypothesis postulates that the cause of asthma, eczema, and other allergic diseases is an unusually clean environment. It is supported by epidemiologic studies for asthma.[9] The hypothesis states that exposure to bacteria and other immune system modulators is important during development, and missing out on this exposure increases risk for asthma and allergy."
http://en.wikipedia.org/wiki/Eczema#Cause
If you're that paranoid about bacteria I can only imagine you use copious amounts of strong detergent when washing which is far more likely to irritate your skin than one day's dirt.
Also don't use the dryer unless it's raining outside. Please don't tell me you tumble dry all your linen everyday? :S
I assume you live in the UK. Is aircon really necessary? I realise that PC + server + amp must make it pretty toasty but couldn't you move the server to another room and open an window rather than paying a fortune to try and cool something very hot with something very expensive?
You could think about buying some good headphones to use occasionally instead of your amp, which would also reduce power drain.
That's before we even get to small regular savings like not leaving stuff on standby, only boiling the water you need, only using the dishwasher when it's full.
Seems to me the reason you're spending a ridiculous amount on electricity has little to do with increasing energy prices and a lot to do with you using a ridiculous amount of electricity!