Will my campus life be better at UC International College than staying off-campus?

You can either choose private sector jobs or go for the competitive exams to secure a good government sector job. 

There are not enough valid reasons to choose UCIC over Massey University.

As the UCIC is foundation studies and pathways oriented college while the Massey University have a variety of programs with more specialization.

The chances of getting a reasearch opportunity at UCIC are unlikely to happen, whil

The basic requirement of documents at any international college including UC college are- completed application form, academic records (transcripts and diplomas), English proficiency test scores (e.g., TOEFL or IELTS), and financial documents (e.g., bank statements or proof of funds).

Yes UCIC is cheaper than UW because the UCIC offers programs that are related to foundation studies and pathways for University which are not a full degree programs so these programs are less expensive 

On the hand the University of Waikato offers full degree course programs which are expensive

For the Indian students the deadline for 25-26 academic year would be somewhere in 1st week march 2025. That is their usual deadline for the summer intake . This year's deadline has already been passed.