New Zealand visas are not difficult to access for tourists. The Internet connectivity has made the entire process shorter. The bank balance requisite and documentation proof of profession and residence is no different from the visa requirements to other countries. Getting a visiting or tourist visa for New Zealand is a process you can kick start online from the comfort of your living room.
The online forms and all the required documentation details are available here:
https://www.immigration.govt.nz/new-zealand-visas/visas/visa/visitor-visa.