You want a camera that captures your trips well and lasts for years so you only buy once instead of upgrading in six months. Entry-level mirrorless setups usually run about $900 for the body and a kit lens, which is a serious chunk of change to drop all at once.
Wait until the autumn announcement season when camera brands drop new flagship models. That is when retailers mark down last year's proven gear, and you get the exact same camera performance for a lot less cash.
Remember that the 0% intro APR for 15 months on purchases and balance transfers is a strict deadline, not free money. If you still have a remaining balance when those 15 months run out, standard interest charges will hit whatever is left.