Golf
Compared to Resorts I think Golf would be easier to complete and ad to when a new one opens, like I mentioned earlier, the majority of golf courses are built to sell property and I would think developers would pay decent money for their banner ads to show up on Golf.ae (once it was developed and recieving decent traffic), There's no reason you can't advertise Hotels/Flights on there aswell, either paid banner advertising or affiliate links...or both. You could also have affiliate banners for Golf equipment and if you are really ambitious you could set up a shop selling golf equipment, I know its easy to say but its not impossible to do if you have a decent budget and team working with you..money money money :hehe:
(They have invested a HUGE AMOUNT of money over there in golf so if they are going to want a domain back out of all the ones you have it is likely to be this one, do something with it asap to protect it IMO)
One of the terms in the ae registrants agreement is you're not allowed to hold domains to prevent others from using it...(or words to that effect)
Flights
With Flights there are already affiliate advertising set up, like Emirates, Virgin, British Airways etc + the majority of people booking a flight will also need to book a Hotel (rather than a rental property). You could also have info on each of the airports to bring in more search engine traffic/potential customers
Weather
Quick enough to set up a small site using a free weather feed like
Weather On Your Website - add weather.com weather to your website or similar, it would be harder to make any money from but I would just try and stick hotel related adsense links on if it was me.
The best thing or end game for this domain IMO is that once developed an enduser would make a decent offer to buy it from you, maybe the local government (if they don't take it off you). If they are planning to make the uae a main yachting & tourism destination then weather reports are pretty important...infact weather reports are important to most people in general.
Resorts
Nice enough domain but a little too vague for me and a helluva lot more work needed to build it out properly, still has opportunities for advertising Hotels, Flights, Car Hire etc
..of course all these ideas also need some money and good quality development skills to put it into practise :hehe:
..ideas are cheap !.
Good luck
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