I own a Mimaki CJV30 with CMYKLcLm and double White SS21 ink, nearly a JV33 with integrated cutter.
My opinion: unless you use white ink daily, don't go this road, a real pain to maintain the machine in good shape (printhead, pipes, cart must be shaked every day at least...) and costs a lot (ink is twice more expensive and a lot it thrown away during cleaning cycles).
Also consider the white is not opaque, only suitable to print on clear for windows graphics, nothing else. Think that when you print with white, the speed is very slow, about 0,5 sqmeter (!!!) an hour at best with most opaque white.
The LcLm doesn't add much print quality but breaks the print speed by nearly 2 so no reason to choose CMYKLcLm ink configuration. It's not worth it. This last fact is not based on my own expericence, it's what I read on the web as I have never run 2xCMYK on my mimaki.
I wish I had choosen 2xCMYK from start. I will switch to it as soon as I must replace my printhead (1 of both white channels is clogged for 2 years so can't switch to 2xCMYK, but it is not valuable enough for me to pay 3k€ to change it as other ink channels are OK).
I also have demand for white ink printing but I have to reject the orders. I consider buying a SummaDC printer, enventually a Gerber Edge. I need very opaque white ink (small labels with clear background to be placed on dark surfaces) and my Mimaki is definitely not the best candidate for this.