Interesting. An old rule of thumb was 1MW could power 1000 houses. I later learned not all MWs are created equal, some apparently are harder to generate and solar falls in that category, so a MW of solar power supposedly powers between 100 and 300 houses depending on weather, percent of sunshine, and a pile of other factors.
I saw an old article from 2003 that peak demand from WDW, or more specifically Reedy Creek, was about 190MW. That was peak demand, not average demand, but it's an interesting starting point. Assuming peak demand is about 25% higher than average demand, average demand would be around 142.5MW. Of course as of an award WDW won in 2013, they had reduced the power demand by 10-15% from base level 2016, so they could be down to an average demand around 125MW. Fun stuff, but the upshot is this field could generate more than 1/3 of WDW's average demand, or it could be only about 1/12th depending on the efficiency of the solar generation.
Which is all very interesting. When using the old rule of thumb it is assumed a field that size could light about 50,000 homes or, using the solar rule of thumb, about 5,000-15,000 homes. It's a lot of energy regardless, but WDW is a massive energy user. I believe at one time they even had a clause in Reedy Creek's deal with the state to have the ability to build their own nuclear plant to cover their power needs.