I've played Elite VR on GTX 970 a couple years ago. Without Horizons, though. But it ran fine. Naturally you can't expect the highest details on stations and whatnot, but the experience is still amazing.Have a GTX980ti - not sure how that would handle VR I could slap in a GT2080ti if the divorce proceedings went OK. Or perhaps wait until the GTX3080ti comes out and there'sa decent O/C on an i9 10900k.
Nowadays, if you want to upgrade, an RTX2060 is plenty enough for everything. Or the RX5700.
Whatever that mention of a divorce means, I hope you're okay.