I think that it takes a great love of the sport and a heightened sense of adventure and challenge. Every one can dive tech, question is how long. It is my opinion that the greatest attributes for a tech diver are dedication, commitment and an open mind.
Physically most divers can be qualified to dive tech, if you have the dedication of training and keeping in shape. (If you are not up to par now that does not mean that you cant be a tech diver, it may mean that you have to spend a couple of months in the gum before you try it out).
Yes the equipment cost a fortune, but if you want it bad enough and if it is a priority, most of the divers will manage it, just think hoe much money an average person spends on alcohol a year. It also costs a lot because your life depends on it. Most life support items in all sports are expensive, but the cost does not always dictate quality.
It is the mental aspect that limits most divers I know; self control, judgment and responsibility are the initial hurdles. Self-discipline and focus are primordial. I think the mental aspect is the THE hardest aspect of tech diving. Also it is the hardest of skills to learn or adapt (people have their own characters of philosophies that are unique and often not compatible with tech diving).
Open mind, tech diving was (lets say) perfected by trial and error often at a very high price. So learn from it. It is important to be knowledgeable and have analytical approach to all the daily changes in our sport to see what really works for you as you are the one to risk your neck out. (Now I DONT mean to contradict the experts, but find out WHY a change was needed and why a new way was recommended).
THE most important things are is:
A Big truck, so sell your car, since the big truck wont fit into the garage, use that space to store you tons of equipment.
A girlfriend/wife that likes diving, if not GOOD LUCK!!!
A frequent doctor miles for all the back pain visits. (learn how to do it right and most likely you wont hurt your self.)
A power winch.
A baggage handler.
What do you think it takes?
m&m