Whether paying off the CDD bond is actually worth it.

Usually yes. Most districts allow a lot owner to prepay the remaining debt service portion in full, which permanently removes that line from the tax bill. You request a payoff figure from the district manager — not from the HOA, which is a separate organisation and cannot provide it. What prepayment never removes is the operations and maintenance assessment, which continues for as long as the district exists.

It lowers the monthly cost of owning it, which is not quite the same thing. A buyer comparing your house against an identical one still carrying $1,800 a year of debt service can afford to pay more for yours, so some of it comes back — but rarely all of it, and only if your agent actually puts it in the listing and explains it. Most do not, which is how sellers end up having paid off a bond nobody gave them credit for.

Whatever the money would otherwise be doing. If you would be paying down a 7% mortgage with it, use 7%. If it would sit in a money-market fund, use that yield. If you would invest it, use a realistic long-run return rather than an optimistic one. The higher your alternative return, the less attractive prepayment becomes, because you are buying out a stream of future payments with money that could be working now.

Usually not, and the calculator shows why. Prepaying buys out the entire remaining term, but you personally only avoid the payments you would have made while you owned it. Everything after that is a benefit you are handing to the next owner, and the market only partially prices it. Set the “years you expect to own it” field honestly and look at the second verdict rather than the headline.