Yeah Quadro's with Sync work every time.

Has surround fixed issues with tearing? Last time I tried it was in 2018 and it was 100% unusable for larger setups. Tearing all over the place.
A Quadro and sync 2 card is a surefire way to get the results you're looking for.

I've seen 3 major festivals crash and burn because of a VJ using these.

Resolume reads whatever displays are connected to your OS. So if your OS see's those ports, you're good to go. I would say the 5000-6000 would be a good range to use. I personally use the 6000's. You will also need a sync 2 card as well. buy the PNY flavor used on ebay for like $300. paying $1k plus...

FX4's are for 3G and smaller rasters. Anything larger will require a Quadro and a sync 2 card.

Only Quadro cards support this

SMPTE 2110 is not feasible for most broadcast studio's let alone tours and festival setups. You need a 20Gbps NIC just to run a SINGLE 4K stream. The ONLY benefit I see from SMPTE 2110 is the ability to sync. NDI unofficially has plans for this in the future as well, with NDI HX3 you can run a singl...

why 30 layers? That looks very abnormal to me.

They should. You can download a free demo version of Arena and test it out.

All those software's on the same machine?