What is your reserve like financially? How many months can you live without income? Do you have any commercial photography background?
It isn't as easy as buying the gear and doing it.
Approximately 16 months, I am sure that I could stretch it even further if I were being conservative with my spending.
Moreover, yes, I have done a few product shoots for local businesses in the last couple of years, they have been challenging, as I was having to use nothing but a couple of speed lights for lighting, but it seemed to work, with a little bit of effort, the photos turned out pretty decent, which got me thinking that I might be able to improve on it with better lighting equipment and perhaps a more powerful camera, you have to remember the Pentax K-3 is a 3 year old APS-C camera and the K-3II isn't all that much better.
A lot of my friends work freelance as creative design experts, that is how I got all of product shoots, I think that with a good enough setup I could expand on my past experience and really make something of myself here.