Maybe Foley can grab some land from Avondale Racecourse for a small stadium?
https://www.stuff.co.nz/nz-news/350237729/community-raises-concerns-avondale-racecourse-tipped-housing
https://www.stuff.co.nz/nz-news/350237729/community-raises-concerns-avondale-racecourse-tipped-housing
It passes the "easily accessible by public transport" test, especially after the CRL opens
Article mentions the locals want to keep their Sunday Markets and the playing fields. A training base and small stadium works for easing those concerns.