I think a lot of us were the same way starting out. I remember being on the boat for my ow checkouts and there were tec divers on the boat. For some reason it stuck in my head that was what I wanted to do. I went diving all I could for 3 years and finally went into tec diving. It can be done in a lot less time but it took me that long to gain the experience and be able to afford the proper equipment and training I needed. That same equipment has taken me through every single tec/cave course I have done. It's nice to go deep but for me there has to be something worthy to see to gear up, imo there is really no sense in going deep just for the hell of it other than telling your friends about it. I eventually went into cavern and cave and those courses were the most challenging and rewarding courses imaginable. They changed my entire outlook as a diver, changed my life as a diver. I am probably around $23k in gear and training but certainly can be done for less or more, much more!! Luckily I have worked for dive shops most of my diving career and now I own one so equipment is a lot easier to come by both new and used. There is nothing at all wrong with used gear as long as it is serviced properly before use. I still love the fact of people talking about the "random" agency class and bashing it cause it may not be necessarily the "cool" agency to be certified as a tec/cavern diver. My tec inst is PADI and cave inst is NSS/CDS, IANTD and both of them are amazing! I will probably never use anyone else besides those 2 guys. I have also used SSI for a cert and that guy was great as well! As many of us have stated a million times, IT'S NOT THE AGENCY, IT'S THE INSTRUCTOR THAT MATTERS. Talk to your instructor you may want to use, ask for his credentials, ask other students of theirs. Accumulate your gear as time goes on and keep it serviced and it will all be ready for you when the time comes. Best of luck to you!