Just got into the business. Have been using the oreck orbiter to do tile & grout and a little carpet.. I want to focus on restaurants though and after a recent experience cleaning about 1800 sq ft. of caked in grease from 15 years, if not more of uncleaned floors... The oreck is just not what I want to use cleaning restaurant floors. Took me about 13 hours and have to go back to get some missed spots.. all for 700$ (mind you with this being a second job at around 50$ an hour, pretty good compared to my 9-5).. anywho.. gonna be financing a ninja e1200.. I have never used a portable let alone a truck mount. Literally only the oreck.. I was wondering if anyone can give me some tips on how to use it, especially on extremely soiled floors like the job I just did. It will come with an hs spinner 12" for now. Any help would be great, including maintenance on the machine tips, psi to avoid and any general advice you have including job quoting extremely soiled floors to what product to use in said situation. I'm excited to start in the industry and have found a passion to do this line of work . I give kudos to all who've been in the janitorial industry as it is not as easy as it looks! Thanks a lot.