Individual ion engines have been built up to 1.1 lbf for 100kw. Over 2 weeks that’s 9.8m/s * 60 * 60 * 24 * 14/ mass that’s 1.2 km/s for a 10,000 lb spacecraft. And nothing says you can’t use more for a larger spacecraft.

For comparison the ISS’s solar panels are over a decade old and still generate 240kW in direct sunlight. So, you could easily reuse those panels for multiple trips, though power output is cut in half near Mars.