Basically it comes down to what parts you need and options you want. Buying everything in one shot might scare you...lol.. If you already have a Makita lipo drill its really not that bad because the majority of the cost is in the battery and charger... Just off the top of my head heres some approx. pricing.
Finer edge mfg battery adaptor: $50
Makita battery: $50-100, there are two sizes you can get, the 1.5 or the 3.0 AH pack. Keep an eye out on ebay , sometimes you can find a good deal.
Makita Charger: $40 (ebay)
Starter handle: $60?? I have had mine for 15 years at least... I might be a little off on that lol
Starter: $50-100 ?
Hope this helps.
Brian