No F1 team has a thermal wind tunnel, manufacturers do, but there is no evidence of it being used. What Merc has will not be available to Haas for the time being. For starters they are going to have a car put together by a third party while there own R&D department is being set up. With every department being set up from scratch it is best they have the maximum possible time to work out their operating procedures and understand the car. Haas has a track a couple of miles away from his current factory so why not get his team up and running for system checks and reliability runs? Setup can always be done during the official winter tests. in 2013 Lotus had designed a car that was suited to the tyre, it is by taking a very conservative approach to the geometry that they achieved that, not by having special data available to them. The data on tyres is the same that is available to all teams.
PS - Why were filming days this year used to validate the reliability of the system?