Titans go on ebay for next to nothing. I saw a NIB titan go for 5 bucks.
The schulze 18.97 KWF (you said kwh, but i think you meant kwf) has been cancelled. They now have the schulze 18.97 KW. It works just as well, if not better.
I think that the schulze controllers can handle the plettys, but i don't think the 9918 could. I bet the 18120 could handle the pletty, but someone please correct me.