LOL - you know when people come on here asking if a plumber's quote is too high? And the advice to them is to phone one or two more plumbers in the area to see what their prices are? dot, dot, dot.
Have you phoned one or two other website companies?
A bit cheeky, I know!!!
I just wanted a simple website and now how to do this search engine optimization stuff, so made a DIY website. It works for me and I'm not convinced that if I'd spent much more it would have generated much more business.
BUT!!! - That's because I had already created an image for my business, knew my logo, font type, colours, etc, etc, etc. I knew my type of customer, which area of the plumbing market I was in, etc, etc, etc.
I think many people (not just plumbers but even large businesses) don't even consider what their business image looks like, before the website. Then they let a designer loose on designing something and feel the website creation is really cool and buy the site. Then a few months down the road they find it's not bringing in the business they had hoped it would. The reason is frequently because the website looks nothing like the van they drive, for example, or it has pictures of smart taps and bathrooms and the work they do is heating (not very photogenic). With my website you're hit by a water leak (I mean a smart, luxurious water drop). My van has a massive picture of this on both sides. The typeface is the same font and colour on the website and the van. The background of my business card has this water drop. I wear sweatshirts in the same colour. Blah, blah. I'm rabbiting (again) but hopefully you can see what I'm getting at.
The £750 might have much more to do with matching the website to your business rather than just designing a few pages and rattling them off on to the internet.