All the info provided above are accurate, except HI. KMRY to Maui, October winds, 2 Pilots, FA and Family of 5 (2 adults, 2 teens, one toddler) flight planning didn't show a wet footprint that i remember. Started with full tanks 12.1K, landed with plenty of fuel for a diversion to HNL, 45' plus some extra. Return non stop Maui to KBJC landed with over 60' fuel left, wx was VFR.
Engines: The CFE738, unique to the 2000, being the only airplane that mounts them. Good engines but not in production anymore, however plenty of support from Honeywell as well as spares. MSP is a must, without coverage, will be very expensive to maintain/fix. If you purchase an airframe that didn't have MSP on the motors, they need to be inspected by the manufacturer before they can be implemented in the program and covered. Sometime they are deemed not eligible for MSP, you can imagine the rest...continuous MSP coverage from previous owner/operators preferable: S/N 5, 3-4 years ago suffered some major engine damage, no MSP. Repairs estimated to be too high, airplane was written off, disassembled, and sold for parts. Don't quote me on the exact s/n, but the airplane was in North Texas. That was back when DA-2000 still had higher/good value.
As far as equipment installed i wouldn't focus much on winglets, but focus on avionics installed and provisions to comply with the upcoming mandatory requirements. Original avionics do not offer much flexibility to comply with ADS-B etc. so if you go for the bargain make sure you really get a bargain (either you strike a s/n with equipment installed or most of it), or get a cheap airframe that leaves enough budget for the needed upgrades. Hope it helps