Apparently it was "significantly cheaper"
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I did a quick search for a week in September next year (so prices may be off slightly for what Victoria paid) but the cheapest at Disney came up at £1,134 and Endless Summer was coming up at £728.
The uber from the airport was $50, her 2 ubers to and from Epcot were $17 & $20. If you round that up to $40 a day and take 2 ubers a day for the 6 full days you're there (assuming you don't take any extra ubers on travel home day other than the one to the airport, another $50), you would only be saving around £66, hardly significantly cheaper imo. I'd save myself the hassle and just stay at one of the All-Star resorts