I got my Horary Craftsman diploma from John Frawley nearly 20 years ago and have studied recently with him since. Yes, it is expensive but you get what you pay for and because of this, there aren't lots of other students so you will get his undivided attention. He does not make it easy for you in any way and won't let you pass a lesson until you totally understand it and more importantly why. The lessons are thorough and some (most) are incredibly hard. I took weeks on one question because he just wouldn't let it go until I got the relevant point and knew why it was so. You also get to work on your own charts and use them as part of lessons too. You are not rushed and there is no finishing time if you are consistent with handing in your work, no matter how slow you are. You learn at your own pace. When I did it he hadn't written his textbook so had to work with Christian Astrology only and a few other ancient texts, that in itself was a learning curve so having his book now will, without doubt, make it a bit easier to understand some of the concepts. You won't get this teaching from anyone else.
It isn't a case of learning or selling 'his methodology' - he teaches you 'THE methodology'. The tradition as used by William Lilly. Forums and Facebook groups are not the best places to learn horary because you pick up other people's misunderstandings, re-interpretations, modern concepts and bad habits. He will knock any of this out of you!
He will always be the one I go back to and he still goes over my charts occasionally when I am not sure about them even now and he answers my queries if I have any. If you can afford it then you won't be disappointed and know that you will have earned your certificate because you will have the bruises to prove it!
If you go for it, you will hate it and love it at the same time but at the end, you will be proud of yourself for getting through it!