Question about the Hoover Floormates?

I recently moved into a 5 bedroom, 2 full bath, 14 room total home that was totally refurbished in 2005 and is now handicap friendly, which includes very nice linoleum throughout the entire home---not one stitch of carpet. I have 5 children; some still small that love messes and I am breaking my back sweeping and mopping all of these rooms all of the time. I have been scouring ebay for the Hoover Floormates, the "sweeping mopping and drying" machines. What I need help figuring out though before I purchase one is that they have about a million different model numbers. Does anyone know which model numbers are "newer", which are "older" or even just which model works the best? Of course with so much area to do I am looking at the widepath models. Any input is appreciated. Thanks!