since by your own admission, you dont print much, just get the smaller 110mL carts except maybe larger CO or some of the light blacks (both get used much more than the others) and then just wait.
There are some colors that just barely get used at all.
So, yea, the 110 carts are $97ish but thats a big difference and why tie up $$ in ink you'll never use? If you do start selling prints in 2019, worry about it then since you'll have some cash flow. Also, if it's a concern, save some $$ for the eventual head replacement that Canon requires every couple of years. I think the PRO2000 has 1 head approx $500 or so.
No one ever said these are cheap to run
I'm just about to throw away an Epson 3880 maint. cart w/ 165mL of thrown away ink
($115 thrown away)
PFI-1100 MBK
$97.00
PFI-1100 PBK
$97.00
PFI-1100 C
$97.00
PFI-1100 M
$97.00
PFI-1100 Y
$97.00
PFI-1100 PC
$97.00
PFI-1100 PM
$97.00
PFI-1100 GY
$97.00
PFI-1100 PGY
$97.00
PFI-1100 R
$97.00
PFI-1100 B
$97.00
PFI-1100 CO
$94.00