Hi minipie
Yes we used a joiner for all the cabinetry. Basically my architect and I sat down before our renovation and planned the layout, I bought all the appliances separately and sourced the stone myself. I had an electrician and plumber already on hand for the renovation. I had farrow and ball paint colours duped and sprayed like you’d spray a car. Much more durable than actual F&B paint. This was a more long winded way to go about it, but worked out well. My kitchen is fairly simple with a 5m island with drawers with hob and sink and back wall with all the appliances, aga, cupboards and larder. There were no complicated corners to work around and no space issues.
I’d say my kitchen is nicer than my friends 
but that’s because it’s completely suited to our needs. But because we already had trusted workmen on site, it went smoothly. If you are also planning an extension, seriously look into this route. You need a good eye, enough spare time and a willing architect to make up the plans.
For a much smaller properties to sell on, I’ve successfully used Ikea, upgrading handles etc. It’s a complete pain in the arse to plan though. Also look into bristish standard cupboards if you’re willing to put some work into it, they are Plain English but you need to plan it yourself. Much cheaper though. It is more traditional in style.
Haggle hard for your appliances. I bought them all in one go and negotiated a 15% discount. Well my husband did anyway, he can sell snow to the Inuits.
It can be done circa £30k plus another £10-15k for appliances but really depends on your kitchen size and what stone you use. Do you know the size yet?
Just looked at Plain English website, now it says the kitchens start at £45k. Well that’s gone up rather a lot then 