That is really beautiful handcraft, I love carving on wood, actually I was thinking myself to start up doing something like that. Three years ago we had to cut down an old tree just at our stone wall so we have a lot of chopped wood therefore I thought to use it. But you need to have s much instruments before even starting so I changed my mind.
Monument is done with a lot of love to details and hopefully will remain for future generation to prevent them from hte mistakes of the previous generation :)
Being talented like you I think it's worth to buy some tools. Maybe you can borrow it first, and if you will love the craft, you will still have the time to buy your own.