A VMware IT Academy will almost always be the cheapest way of completing authorised vSphere training to meet the requirement for VCP-DCV.
There is an option which does NOT require completion of authorised vSphere training, but it requires that you achieve the VCP-NV.
One of the possible paths for the VCP-NV requires that you have an active CCNA, CCNP, CCIE and then pass the exam for NSX.
Choose the Cisco Certification path on this page for details: https://www.vmware.com/learning/certification/vcp-nv-nsxt.html
If you did that, you would also be awarded the VCP-DCV since you have already passed the vSphere exam.