@Skylar Vincent Inagree with with what @Todd Dexheimer explained that if the 15k you invest to learn starts to generate 15k a year in cash flow, then it was worth it.
You are asking a biased group the question of whether or not paying for education is worth it. There is a higher percentage of people on BiggerPockets that have a negative opinion of paying for education. So when you create a post asking if you should pay for education you will get more responses of people who say not to but instead put that money in the first deal.
A better question to help you get what you are looking for might be to ask people who have spent more than 15K on mfh investing, was your education worth it, or looking back, would you have done it a different way.
@Skylar Vincenluet, I think you just received some valuable coaching for free in your 51 replies :-). Reading between the lines of some of the replies, I think most people arrived at their level of success with hard work and grit. BTW, I just discovered Michael Blank, and I think his podcast is one of the best for MF and as was mentioned, he does not do a hard sales pitch. I can't fault the "guru's" as they earned the right to charge us newbies for their lesson's learned because they paid the price. However, based on my own experience, the best way to learn is through experience. Perhaps us newbies should network and share our learnings as we go along. I've learned a lot by researching the free information and resources on the internet. I am planning to stand up a syndicate and researching properties.