If we use your timeframes, and discount what doesn't apply then we have a more realistic picture.
There has been far more work carried out behind the scenes than many believe. It's not impossible to see a situation where we have already secured options on our preferred site, and that plans have already been drawn up. Local authorities have also been spoken to which won't guarantee planning permission but will certainly smooth the process. Also, the planning process has changed a lot over the last decade which can fast track appropriate applications.
So let's say that immediately after the takeover has been confirmed, an announcement is made that land has been purchased and planning submitted. Its not unreasonable to think that planning couldn't be granted during the next 12 months. Without the need to complete additional land or clear the site, main construction work could start immediately.
2 and a half years from ground breaking to completion for Brentford is a little longer than May have been expected, and covid could have contributed to that. DC Uniteds Audi Fields was completed in 17 months with Thohir at the helm.
So I suggest a slightly different time frame,
November 2021 - takeover approved by efl. Bakrie confirmed as Chairman. Announcement made regarding our intention to move.
December 2021 - confirmation on land purchase and the submission of plans for development of stadium, community, retail and leisure facilities.
December 2022 - planning granted
January 2023 - ground breaking, construction begins.
June/July 2024 - stadium completed and handed over already for the start of the 24/25 season and a year ahead of the lease running out on the Kassam.
For those already looking to angrily quote these dates, they're there as a guide only but to show that completion could be much quicker than is being suggested, and even building in contingencies means that we're very unlikely to be homeless or ground sharing any time soon.
And, once more, we are definitely NOT buying the Kassam!!