Time travel is possible and will be feasible in the near future. Though you don't need a machine to do it.

You can time travel simply by closing your eyes and imagining. And it can be done right now!

You couldn't be more correct vod, thank you for speaking positively.

Though, after singularity, you will be able to physically revisit any time, at any place, at your will. All it takes is belief that you can do so.