This solution pertains to anyone having problems with their game freezing on the One. Hopefully there are few people with this issue.
So obviously you need to play for 50 hours.
The problem is, once you finish the other 49 achievements, you definitely shouldn't be at 50 hours. I finished at 19.2 hours. Leaving the game on the garden with a wired controller leaves you subject to Langston asking for a challenge, pausing the time. And for me, playing on the XBox One, the game froze every time I kept it idle on the Tower of Sour. I think the solution for this is to (unfortunately) delete your saves off the cloud and start a new garden to the point where Costalot's store opens. Do not plant any grass or fix up any hard soil you don't have to. Whirlims and Sparrowmints will become residents, and Whirlims will have an egg as part of the tutorial, but after that, there will be no more interruptions, such as Langston's challenges, because you're too low of a level.
The reason for using this method is that the Tower of Sour method does not autosave. I left my console on for an entire day just to find out it froze sometime between and no time was saved. The only problem is to find a different place to store your saves so you don't deal with Langston's challenges, as you retain your level when making a new garden.