Personally, I would recommend investing in a premium trade brand like DeWalt, Makita, AEG or Bosche Blue.
Personally, I would recommend investing in a premium trade brand like DeWalt, Makita, AEG or Bosche Blue. You can certainly acquire tools much cheaper, but these brands carry a trade warranty and are suitable for extended runs times and trade conditions. If you are intending to work in the trade I would buy the tools you need now to prevent having to double up later. I would also advise to decide on a brand and stick with it as batteries are not interchangeable between brands. There are some decent savings to be had with kits similar to the Bosche Blue professional series instead of buying the individual tools. You just need to make sure you'll be using all the items in the kits to make them a great purchase.