Dude, F*CK turbos. more heat, more moving parts, more plumbing, more problems. My opinion is there are two ways to have a reliable turbo setup - super mild, low boost that doesn't get beat on much (which, this theory is still in the testing mode, but so far so good) and the trade off is obvious there: a limp d:ck power output. The other side of the equation is an ultra high dollar shop sponsored car that people pay other people to work on constantly.
I just hate to see this man. I've been there several times in the past and I know where my path has led when I stood at this fork. Maybe find a mild HCI long block for cheap somewhere and toss it in while you figure out what to do with your expensive motor.