And hey, you know what, that's almost got a point. Firstly, I'm in the US, and I'll freely admit that my comment was highly US-normative. However, I believe my comment on government corruption stands for the US case, where there is an insane amount of space that is already partly-developed in random bits of desert.

Now, let's get into your claims against the Netherlands case. Let's do some "basic maths":

1. Unless the IEA is very, VERY wrong, your claim that the Netherlands consumes "2600 petajoule per day" is INSANELY high. Every statistic I can find shows electricity consumption being between 113 [2] and 121 [1] Terawatt-hours per annum. Let's divide that larger value by 365 (assuming uniform seasonal demand), then convert that into joules, and we get 1.19 Petajoules per day. more than a THOUSAND times smaller than your number.
2. Secondly, this "just 1 small country" bit is spurious, since your "small country" is the 33rd-greatest electricity consumer in the world for the 77th highest population [2]
3. The assumption that you must store an entire day's worth of energy demand is ludicrous. Let's be generous and assume that you have to store 50% of the day's energy demand, despite the fact that the off-hours are during the night, when electricity demands fall off.
4. Next, let us point out that we don't need to abandon literally every other method of energy generation. From wind energy to, yes, nuclear, the Netherlands is doing quite well for itself outside of solar. Let's assume that we need to cover all of the electricity that is currently produced using coal, oil and natural gas. All other sources already have infrastructure supporting them, including the pre-existing solar. This amount comes to about 48% [1], so let's assume 50%.
5. Now, we need to cover 50% of 50% of 1.9 petajoules at any one time, or 475 gigajoules, at any one time.
6. Because I neither want nor need your supposedly-charitable assumptions, let's use the actual numbers from ARES in Nevada:

• Their facility's mass cars total 75000 tons in freedom units, or about 68040000 kg. [3]
• They claim 90+% efficiency round-trip [4], but let's assume that your condescending tone has made the train cars sad, so they're having a bad day, and only run at 80% efficiency, despite the fact that we've known how to convert to and from GPE with insane efficiency ever since Huygens invented the fucking pendulum clock.

7. Now, is this perfect for everywhere? Of course not. Not everywhere has the open space necessary. The ARES site requires a straight shot about 5 miles long, but they managed to find one that, in that distance, drops 2000 feet (~610 m) [5]
8. Now, let's do the math together: 475000000000J / 10m/s^2 / 68040000kg / 80% Efficiency = 880m total elevation needed
9. Thus, unless my math is quite off, we would only need 2 of the little proof-of-concept ARES stations running at 80% efficiency to more than cover the energy storage needs required for your country to completely divest from fossil fuels and go all-in on solar for the remainder of your needs.

Quod Erat Demonstrandum.

[1] https://www.iea.org/countries/the-netherlands [2] https://en.wikipedia.org/wiki/List_of_countries_by_electricity_consumption [3] https://aresnorthamerica.com/nevada-project/ [4] https://aresnorthamerica.com/gravityline/ [5] https://energy.nv.gov/uploadedFiles/energynvgov/content/Programs/4%20-%20ARES.pdf

ETA: rectify a quote ("just 1 small country"), and make it more civil in response to the prior commenter removing some of their more condescending language.