I read about VPS again and again, but is it really necessary to run the secure node on a VPS or can I also just run it on my home cumuter?
https://blockoperations.com/how-to-build-and-operate-a-zencash-secure-node/Secure Node Criteria
Each of the following criteria must be met and maintained for a Secure Node to be eligible to recieve a share of the reward pool.These items may be added to or modified at any time.
Must maintain a balance of at least 42 ZEN in a 'stake' transparent address
Must maintain a minimum balance of .001 ZEN in a private address on the node for challenges
Must be available with minimal exception time for at least 92% of an earning period (appox. 1 day)
Must perform a challenge in under 300 seconds
Allow 8 or more peers by allowing public connections on the configured zen port (default 9033)
Must maintain a valid public SSL cert properly configured for zen
Must not fall behind the current block height by more than 4 blocks
Must update to current versions of the zen and/or tracker software within the posted time frame
Note: only one public Ip address is allowed per node (IPv4 or IPv6).
You need to have IP which do not change, and you will get one node per IP. This is why VPS is much better solution. Not to mention you need Virtual machine,good CPU, Ram..
This must be a dedicated machine anyway