I suppose it depends on what you really enjoy doing in ACNH! I personally think it's definitely worth it!
The below could be a little bit spoiler-y if you like the surprise, as it mentions things you can unlock, but maybe it will help you decide if the expansion is worth the money for you!
![Smiling face with smiling eyes :blush: 😊](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f60a.png)
Some things you can only unlock with Happy Home Paradise (to the best of my knowledge):
- Design vacation homes (including two-storey homes), for as many villagers as you'd like, including villagers you have on your island.
- Design non-home buildings, such as (in spoiler): A school, hospital and café.
- Have easier access to buying items, with a shop at Happy Home Paradise that uses a non-bell currency.
- Once the items are unlocked, it also includes being able to order items any time from a HHP catalogue.
- Work through goals, like designing x amount of homes, design a particular facility, etc.
- Unlock new DIYs for making pillars and counters.
- Unlock partition walls.
- Unlock the ability to redecorate the homes of villagers on your own home island!
- Unlock the ability to use soundscapes, different coloured lighting, and polish items for effects.