have a number of tool hire stores around Greece but, unfortunately, not on Crete. I don't know whether it is possible to get something sent from one of the mainland depots to Crete but you could contact them and ask. It might be possible for smaller items. When I worked in northern Greece we often hired equipment from one of the Thessaloniki branches and they had a good range of equipment.
There used to be a small tool hire shop on Kissamou on the way into Chania but it closed down. Somewhere near Voi Noi shoe shop on the opposite side. They had very little equipment and it was pretty expensive. I enquired about hiring a cement mixer and a week's hire was about the same as buying a low cost one from the tool shop where IKA is now.
PS I bought the Nilfisk C110
from e-shop back in 2013 and it is still going strong. The package included a car wash attachment as well as the tools shown in the link. The problem with the floor scrubber was the skirt. A non rotating flat circular brush attaches to the outside of the plastic skirt. Effectively the attachment rides on this brush. The cleaning action is a rotating bar with two jets inside the skirt. The first two I received both had broken clips on the plastic skirt, which is pretty thin, so the brush could not be attached properly. I got so used to using the various wand jets while waiting for a replacement scrubber that I virtually never use it now I have a working one. I find I mostly use the wide flat jet. Covers a big area quickly if the soiling is light and you can make it more powerful simply by moving closer for heavily soiled bits. It is powerful enough to completely shred fly screens if you are not careful.