I am looking for a backup solution to run on the Microsoft Hyper-V Server 2016 host to backup the virtual machines. Veeam Backup and Replication would be the obvious solution, but as this is a home setup with one small server for two users, I cannot afford the £712 box price and would like to stick with the free Veeam offerings (sorry, sales reps!

Whilst Veeam Backup Free Edition is setup for handling VMs there appears to be a couple of problems:
1) The proposed VM would be around 450GB; as I understand it, VBFE seems to do only do full backups each run, not incremental, which as only a few GB's would change each day would be a huge waste of time and resources.
2) It has no inbuilt scheduling. Whilst I understand it can be scheduled via powershell, this is something I'd rather avoid as it adds unnecessary complexity for a simple home setup.
That brings me back to Veeam Agent Free that I currently use. Could I install this on Hyper-V server 2016 and use it to back up the virtual machines? How well does it handle changes to vhdx files? As mentioned above, the main file server one will be around ~450GB, with a few GB's of changes a day. If I use a volume-based block-level backup in Veeam Agent Free, will this only backup the changed bits of the vhdx file each time, or will it consider the whole file as changed and backup 450GB each time?
Thank you for any advice!