Mining Clarifications

Hi guys, i would like to venture into ravencoin mining, however i need to clear my head and would be grateful if you could give me some advice.

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For example i read that it is not possible to mine with an asic, while on a pretty famous site (i post the link in case you want to take a look) https://cryptonomist.ch/2019/09/17/asic-mining-ravencoin-x16r/

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They say the opposite…

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Assuming that I could invest even 5k $, I would like to know if these asics are valid and working or if it is better to jump on the gpu …