175 pads

I am pretty slow right now so I am planning to go to some businesses and give them a pitch... I'm hoping to market vlm cleaning over hwe.... I want to be able to give a demo... I have a 17" 175 buffer I'll be using... Which pad should I go with and how many demos can I get out of one pad before it needs washed?? I know a 175 isn't the optimal machine, if I land some accounts I will be upgrading, but I'm not at the point where I can purchase a new machine without the accounts...

Any help would...

175 pads