Unless you are married to a mainland citizen, getting a mainland residence permit is going to require more hoops than most people would be able to jump through. A multi-entry tourist visa is not the same thing. Do not assume that a tourist visa will allow you to do things like open internet/ utilities accounts even if you can read Chinese and speak Putonghua. And you'd want excellent health insurance - if (heaven forbid) you get run over by a truck one evening, you do NOT want to be wrangling, in Mandarin, with the government hospitals there.
And even assuming that you live right next to the Futian HSR station and work right next to the Kowloon one, immigration exit/entry procedures twice daily will be eating into your time - and as mentioned above you will be needing a new passport every couple of months.