Getting Started need to clear doubts

[StephanAe]

So i decided to move into pc gaming problem is i have limitations because of the country that i live and tax and electronics policies basically i cant bring a pc piece by piece it would cost double for each component and could only bring one component every 6 months so i have settled for a prebuilt gaming desktop this one.

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My questions are,
1) down the line can i upgrade this maybe removing everything from the case and moving it to a bigger case?
2) i need clarification as i see that the motherboard in this one only has one PCIE slot can i change the motherboard for another motherboard that can handle more GPUs?
3) If the motherboard can be changed down the line what does this process involves? Do i need to buy anything other than the new motherboard?

Thanks

 

[CountMike]

It doesn't show exact MB but that being an Acer I suppose they have their standard MB in there so it can be substituted by any of same size. There's Q&A on that page so you can ask manufacturer about it.
If you get one with GTX980 you should be set for very good gaming for next few years at least and by that time you could switch to even higher GPU without having to go for SLI. About only thing I would ad ti it would be an SSD for main programs/games and OS. It's almost sacrilegious not to have one with such a system.