Raven Software dev Amos Hodge has tweeted a reply to a user about why buy station prices are remaining the same across all of the different modes in Warzone.
The official stance on why Buy Station prices are the same across all modes is to ensure consistency for players, so that players don’t have to keep remembering different values when jumping into different modes.
However, Hodge has stated that they are looking to adjust the drop rate of money based upon player count in game. This would vary the amount of cash players can find depending upon the amount of players in each mode.
There is no confirmed time frame for when this changes will be released, but it will be interesting to see by how much the cash drop rate is effected based on player count.

근데 언제 패치될지는 모른다는거 아니야 ㅋㅋㅋ ㅅㅂ
저 개발자 하는말이 " 우리는 플레이어가 인원수 모드에 맞춰서 일일히 무장가격을 외우도록 하고싶지 않기 때문에 무장가격을 다똑같이 맞추는걸 원합니다. 대신에 팀 인원수에 맞춰서 무장가격이 조정되는것을 검토하고 있습니다 "
이말은 모드에 상관없이 혼자면 6500원 이후 팀에 인원 한명 추가될때 마다 1500원씩 가격 증가로 볼 수도 있겠는데? 그럼 4인큐 기준은 11000원 되네