equipment to purchase

I have a 500 psi portable that I am using to clean carpets. I am ready to get into t&g cleaning and have a 1250 psi waterhog and a grout wand. Is this suffecient or should I go ahead and purchase a 1250psi portable and a spinner tool. My thoughts are to have one machine to clean carpets and T&G without lugging the waterhog around as well. also I am to clean 9 small bathroom floors in a daycare next week. IT is the little 1x1 tiles. can I seal the whole fllor when I am done cleaning or is this type floor not suppposed to be sealed.