In my house (from which I have just moved), I had a long galley kitchen with good solid wooden doors both base units, drawers and wall cupboards. Lots of them. They were dark brown and made the whole kitchen very dark. Few years back I did look in at just getting new doors put on. Not only was it horrendously expensive, but I really baulked at replacing these lovely solid wood doors with plastic ones.
There were 21 cupboard doors and six drawer front.
After lots of looking around I discovered a firm that would come in, remove all those doors, take them away and spray them any colour I wished (I chose white) and then come back and replace them and even fitted new door knobs for me on all of them. This worked out at a sixth of the price of replacement. I kept those lovely wooden doors and yet made my kitchen look new.
It lasted pretty well, when I moved, it was six years since I had this done, and there were a couple of chips where I had knocked them. Had I stayed, I would probably have had them done again after about ten years.
Having no doors on any cupboard for a week, really made me clean out all of those cupboards!!!
If you have good quality doors, I would thoroughly recommend this method of updating your kitchen