Skyline Enterprises chief executive Mark Quickfall said the initial cost estimate had been ''very much best guess''.
Since final designs had been completed by the architects and as many items as possible from the ''wish list'' had been added, a quantity surveyor had been engaged and the latest estimate had been provided.
There were no substantial changes from the proposal initially announced by the company in June, but feedback meant the expanded conference and function facilities - which will almost double in capacity to cater for up to 1000 delegates - had been a focus.
''The feedback we've had on that is extremely positive, right through from local conference organisers ... to national and even out of Australia.
''There is no question that the proposed one here, on the Lakeview site, is not going to happen in a hurry. We never designed this to be the alternative but, certainly, we've recognised it will be a great addition to the town and even if a fully blown conference centre goes ahead, it'll be a great supporting venue.''
Most of the 19 submissions received on the proposal raised concerns about the project's impact on traffic management, earthworks, the environment and noise.
Mr Quickfall said the scale of the project was such that concerns by affected parties were ''inevitable'' and the company recognised car parking was a key issue.
While it was limited with what it could put forward or confirm until the consent hearing, it was open to any suggestions from the public.
''We're very open to what we can do to resolve that.
''We are not going to be able to resolve Queenstown's parking issues, but certainly with our own business up in Brecon St, our position has always been that we believe it should be not only Skyline, but all the people who are in business up there, or have an interest, should be in a working party to say 'how can we address this?'.
''It's all very good us putting forward our ideas to resolve our own problems, but we need to consider our neighbours, as well.''
Those neighbours included mini-golf operations, the Kiwi Birdlife Park, an indoor skydiving operation, a cemetery, camping ground, Ziptrek Ecotours, paragliders, and an AJ Hackett Bungy site.
The company was actively working with a range of engineers and experts, including acoustic, operational noise and parking experts, to look into concerns raised before the resource consent hearing.
The proposed development is one of the most significant investments Skyline has made since the current gondola system was installed in 1987 and had been driven by accommodating anticipated growth in visitor numbers to Queenstown over the next 30 years.
More than 787,000 people travelled in the gondolas during the last financial year, and that number was expected to increase to 1.51million by 2030.
''This investment demonstrates great confidence in the future of Queenstown as New Zealand's number one tourism destination.
''Skyline is committed to undertaking this project in a balanced and considered manner so that everyone benefits,'' Mr Quickfall said.
