... for watering the veg at the end of the garden

I already harvest, store, and reuse, rainwater from the roof, ca 200 square meter of roof and 3 cubic meter of storage. This seems a lot but it's a small amount compared to all the water my tomatoes need. So I'm toying with the idea of DIY drilling a well in the garden, say 6m deep. It should be cheap and simple. I'm fine spending max 300 eur for the whole thing, and several hours of hard labor myself. In the worst case it's just cash spent to have fun and getting upper body fitness.

I live near Hamburg, Germany, same latitude and climate as NW England, and there are small streams and lakes everywhere, so I'm fairly optimistic about the chance to find the water not too deep...

Anyone here has done it already and is happy to share experience?

Thanks,

Alberto