I am building one of the big Hellers, the Soleil Royal, and although it is taking me years, I feel so lucky getting that kit before a big jump in the prices of those kits. If you approach it as a multi-year project it is not so bad. Just do not try to rush it, or work on it continually. Work on it for a couple weeks, take a break, build one or two other models, then go back to the big Heller.
I also have one of those big wooden SOL kits from Europe on my in-progress shelves. I expect the Heller to result in a better looking ship, and with less work in the long run.