Yo Darren, thanks; and sorry about my posting ending with a gross aqueduct story.
An isolation transformer and GFCI shouldn't be that expensive. One place to look for these is at places that sell contractors' plant and DIY powertools. I've heard they are commonly used at outdoor construction sites to protect workers who are using power saws, electric drills, and suchlike.
BTW, your Hoover looks like practically new (as in recently designed) equipment. The only thing that gives it away as earlier is the geometric symmetry of the external design elements, which I find more attractive than the recent trend toward asymmetrical curves and insect-like stylistic elements. (For example compare the classic BT 746 telephone with the present offerings...)