The "Motorflugplatz Johannisthal-Adlershof" opened with a competitive flying display on 26 September 1909 followed by a week long celebration and exhibition. In total, the organiser and organisers were provided with 7 beer tents, 9 large toilets, 3 small toilets and a large car park. The event was a great public success, but in strictly financial terms results were disappointing: expenses and fees paid to the "flying stars" and other celebrities for their participation were not matched by revenue from ticket sales. Not for the last time, Müller was invited to fund the shortfall. A separate company was formed by Arthur Müller on 30 October 1910 with a share capital of 2.2 million marks. The name of the company was "Terrain-Aktien-Gesellschaft am Flugplatz Johannisthal/Adlershof", but it is more usually identified in sources by its initials as "Tagafia". The defining objective of the company was to derive benefit from land to be acquired by it, whether through purchase, lease or other commercial involvement, and to participate in other land and construction related business. The background was the position of the "Forstfiskus", the government agency responsible for making available the leased part of the land. The Forstfiskus would be prepared grant a lease for the airfield site to the successful and eminently solvent businessman Arthur Müller (which included, by implication, a company controlled and backed by him). However, such an option could not be granted to the existing "German Airfield Company" (which was now dissolved). The agency's position was the one laid down earlier that year in a Cabinet Order" (""Allerhöchste Kabinettsorder"") dated 21 March 1910 and the ensuing Ministerial Decree dated 9 April 1910, both of which expressly endorsed Müller's involvement. The "Tagafia" finally acquired the site for the Johannisthal Airfield: according to one source, 31% of the land came from the municipalities of and Adlershof at nil cost, in recognition that the project was a "community objective". Also included in the deal was a stipulation that Müller personally should have a right of first refusal in respect of the 300 hectare airfield site acquired for a "substantial price" by the "Tagafia" company. The creation of the "Tagafia" was only one of a number of company formations that Müller undertook around this time in connection with the airfield project, which presumably protected the airfield project, but which also gave rise to a complex and inscrutable network of commercial relationships, over all of which he presided.