Woodworking can mean carving wood such as figures that are smaller than a loaf of bread, or building items like picture frames, dressers, carving boards, tables, desks, doors, windows, coffee tables, entertainment cabinets for TV and or stereo systems, bathroom cupboards, bathroom vanity, trim work around top and or bottom of walls, decks, proches, garages, add on rooms or sections of a house, or even an entire house. Some people build from plans, some design to the requirements of the customer, some build specific furniture from a specific time in history, some buy unfinished furniture and finish it. There are a lot of areas to get into. One person once shoed me a desk he had built and it had many many finely fitted pieces of wood to it. He said it took more than a year to build.
And the tools required vary according to the jobs.
So, Rhill, if you get more specific about the level of woodwork your wife is doing then people on here can give better more specific answers to what would be a good gift. Also it would be of help to know approximately how much you are looking to spend.
I have two relatives who are into woodworking big time. One of them has done it for a living for more than 35 years. One day he told me that when he was getting started he went to a big estate sale and the gentleman who had passed away had a huge collection of expensive wood-working tools, and he bough almost everything there and for much less than it would of cost new.
The house he bough just after he got married was in a rural area far from the city where the lots are big and it had 2 garages. He converged the 4 car garage into his work shop. He has a wood fueled heater that he burns his scrap wood in to heat the garage, and that is made of two 55 gallon drums on there sides one on top of the other that are located towards the center of the area to get good heat exchange on all sides of it. The bottom one has a door to put the wood in. The top one just has the exhaust from the bottom one go through it to act as a heat exchanger to get more heat out of the burning of the wood, before it exhaust to a pipe through the roof. He also added a lot of insulation to that garage so the burning wood does a good job of heating it.
So if you wife is really into working on big wood projects, one thing she will need is a decent size area to do that work.