Yeti 3000x will be enough ?
Possibly, but if I were in your shoes I would not consider Goal Zero, Eco Flow or any of the camping/solar power one-piece power stations. I would look at something like this
POWER+ Nexus Portable Power Station (3000W) | EGO (egopowerplus.com)
These are power stations that are billed to replace gasoline generators on job sites to run power tools. So they're not really suitable for camping or being charged with solar. However, they have the benefit of running off cordless power tools batteries. So you can power your PC from the power station, and at the same time charge one or two other batteries of a separate charging unit. Once the batteries in the power station start to run down, you can hot swap them for charged batteries and recharge the run down batteries, effectively allowing to run your pc off battery permanently.
Not sure how the cost stacks up against that of the Yeti. You'll need the power station itself, 3 or 4 batteries and a separate charger.
If you find you underestimated your power requirements, you simply buy one or two more batteries.
If you buy the wrong Yeti, you're screwed.
A number manufacturers have these. Just make sure you get one that generates a pure sine wave AV power. A simulated sine generator will possibly destroy your PC - so avoid them.
For the record, I have no experience with the ego power station, so I'm going off what I've read. It does sound promising though and I'll probably be going that route myself in the near future to power my audio system.