isnt it more enviro friendly to use non flux stuff theese days?? if you did build a time machine would you spend most of your time in the past or the future?
Basically anything that has mass is a time machine. Closer to the mass time changes relative to something farther away from the mass.
The LHC is a very effective time machine for particles. Their life times change from our point of view because they are traveling so fast.
I think too many people spend too much time living in their past already. I would try out the future so I know what mistakes I will make ahead of time.