Agreed, to make it all year round it would need to be majority indoors. Similar to the fairground type thing at Circus Circus in Vegas.
Except for the Theme Park, the majority of the other attractions or venues can be found in most large towns around the country. Not to mention the nightlife in the economy is struggling, with Nightclubs closing, and Bars struggling.
Overall, I get the feeling it would be a DLP type flop. The climate will kill it in the long term, and they'll try to build everything at once, and people won't come, meaning lack in profits.