An interesting topic for me as here in the UK we have the NHS (for now) and this absorbs a lot of the cost for supplies needed for care. There was a time though when we had to buy plastic syringes if you wanted them instead of using a glass one. Whizz right up to current day and we're in a similar position, pump funding comes from the hospitals and necessary supplies are included in this, cannulas, reservoirs, insulin.
As with most pumps the Medtronic one I'm wearing has the capability to upwork with CGM. In the UK CGM is funded for those planning pregnancy and as such I used mine when carrying my son. As I had some sensors left over I'm still using them up but as soon as my son was born funding was revoked. I think this is quite dangerous as you become reliant upon it to an extent and as such it can be quite a shock to go back to nothing. As they're so expensive self funding isn't really an option and we don't have any other funding options at present. So yes in essence the costs can be great in more ways than one.