Hi!
while youtube reviews arent all that reliable, coming to WK forums asking about what people here think about WK will be quite biased as well - if people didnt like this service they wouldnt stick with it (granted we have few people who use just the forums without doing/liking WK)
Although i think WK is the best tool to get into learning kanji period, i wasnt financially limited when i got into learning jp. Anki and other SRS tools are only slightly worse than WK (at least in my opinion - they still have their own strengths and eventually its best to use Anki for vocab anyways, its just harder to stick with them because its a bit uglier and it requires some customisation unlike WK which requires very little effort) and if using WK instead of them would meant big change in my lifestyle, i wouldnt think long about my choices.
I paid over $1000 for tools, textbooks and immersion methods and out of all of that, WK would be very high on my list for stuff to replace just because of how easily it can be replaced - i see it as luxury, not neccessity.
Feel free to try those 3 free levels to gauge if you even like the system, maybe even check peoples level 60 posts - theres a whole category for that here where plenty of people described their journey through WK or learning japanese in general (me included), this one especially My Journey of 368 days (+ The Ultimate Guide for WK 📖 ) , but i would personally lean towards not buying something you cant afford that has free alternatives (or at least tried anki first to really confirm its not for me)