I think you’re vastly underestimating how cheap most computers are; consumer laptops are around $300-500 median, that’s what most people use. And those laptops don’t game. The enthusiast computer market, while larger than its ever been, is still a ridiculously small percentage of computers sold.
Pay to store it in Finland, like everyone else is doing. They currently have a facility that isn’t even a quarter full and can be heavily expanded.
Solar panels can contaminate ground water if stored incorrectly, that’s a useless statement.
And as discussed there are thousands of storage facilities available. Just because your specific economic union has not built one yet, does not mean you cannot use one of the commercial ones, and by the way these long-term storage facilities aren’t the part that store the waste safely. The containers do, and short of a nuclear bomb going off the waste isn’t escaping them. So much so that despite waste existing since the 1960s, there has never been an incident of nuclear waste escaping containment. Ever. Coal spillages have caused more radioactive contamination than nuclear waste.