From daily mail article...

Within four years, one of these 'celestial vacuums' could have swollen to such a size that it is capable of sucking the Earth inside-out.

Four years ??? That's a pretty slow exponential growth then. So if you have a while, then if you discover one of these holes in the middle of your machine infinitesimally small but growing, can you just hold it there and wait for the Hawking radiation to evaporate it ? Would you need to be able to control its position ? Does that imply a need for a graviton/gravity wave generator to move it or do you move bits of mass about to position it.