True, by having the RCID, Disney got access to being able to produce municipal bonds as a way to have cheap and readily accessible loans. An advantage that other private companies don't have... BUT...
Let's say SeaWorld says to Orange County: "We need new roads with dedicated bus lanes to support the boom in our business, and since you're the county, you're responsible for providing such infrastructure to a big taxpayer like us."
Then Orange County says: "But our budget is really tight and we can't afford it. And if we take out municipal bonds to bankroll the project, we still won't have enough in our budget to pay back those bonds."
Then SeaWorld says, "Hmmm... how about we pay those bonds over time by paying you a 'fee' for those roads that equals the cost of those bonds over time?"
Then Orange County can say, "OK!"
IOW, a private company can make a deal with their county/municipality for extra service if they pay for it, and the county/municipality can fund it with municipal bonds which is being paid off by the private company's "fees" for that extra service.
Right now Universal is paying extra to the county (or town?) for their new roads with dedicated bus lanes for Epic Universe. And if they wanted to, Orange County can fund it with municipal bonds, which will be paid off with the extra fees it's charging EU for the roads.