The new Flow head that minimises draft does so by having the head tilt to counteract the draft angle. The problem with this, of course, is normally the head stays in the same relationship to the material as it goes around. In this new machine, the head angle must change as it speeds up and slows down, goes around corners, cuts different thicknesses and different materials, etc. Part of the draft problem is that the jet shape is somewhat coneshaped, due to declining force the farther away it gets from the nozzle. So, thicker material, more draft.
This new machine has an interactive sensing circuit in the controls, as I understand it, that is constanly adjusting head angle to minimise draft. The downside is that it puts double the draft on the outside of the cut- so the scrap is pretty angled, and you cant use it to cut puzzle piece style, where you use both pieces you cut out. I have had this done before with flooring- where I give them two colors, waterjet cut it out, and switch parts to get a contrasting pattern. Wont work witth the new, improved machines.
I think waterjet in general would be a good way to go for your titanium, and it probably would be the cheapest way. But waterjet prices vary regionally- in my area, the state pen- thats right, the prison- has a waterjet shop, run by inmates, and they undercut everybody elses prices. Needless to say, the local waterjet companies are PO'ed. They complain that their business taxes are being used to fund a competitor, whose labor costs are exempt from all the laws they have to obey, such as minimum wage.
I doubt that buying your own machine would be worth it, unless you have a pretty good ongoing volume. Even a used machine is over 50 grand, and the consumables do add up, as has been mentioned. I suppose if you were going into the waterjet job shop biz, it would make sense, but then you would want a bigger, newer machine, (like all cnc machines, they get obsolete fast) and then you are talking more like 200 grand.