Remember its a National Sports Center in a large area and therefore there is no hotel in walking distance.
The nearest hotel charges around 100€ per night.
In Lisbon, 5 minutes by car, you have a lot of places. And a lot to choose, price, historic, views, beach...
Competition will be divided, norning\ afternoon, so everyone has half a day free so if you want you can do a bit tourism around Lisbon or just go to the beach you have 15km away.
Very soon all information about hotels, transportation, shooting area, schedule will be online in WFTC2016 website.