How sure are you you'll get the wake boat in the near future to justify the 6,000lb towing capacity?
If you're going to be towing just 3,000lbs for the foreseeable future another suggestion would be a Chevy Colorado or GMC Canyon, maybe even a Ford Ranger. Then you'd be able to shoot for over 20mpg. I understand that some of these can tow up to 4,000lbs, but you'd have to look around at each one and their options since I guess some aren't rated even for 2,000lbs.
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