The traning and the medical examination ih Houston they last 5 days(7days if's ur a FSW), if u live near north houston after ur done with the classes on ur first day u can get back home, but if ur far from houston, u can stay in the Hilton or Meriot hotels.But i suggest you to stay at the hotel so u would not be late because if u get late any day that can result to termination. You will need your CMTS number when u check at the dpc for meals and drinks.
In dubai most likely ull stay a day or two, u will have one or two briefing there they tell you when ur flight is ( they do this because they cannot fly only 20 peoples, so they wait the number to increase so that's why u wait in dubai. But dont worry ull get a good time there too. Guess that's all