Until recently IFA was only ok for a homebuilt RAA, but the regs have changed and IFA's are ok for LSA, just not reversible at this time. I know an LSA floatplane with IFA but they had to disable reverse as that's not covered under ATSM.
I priced up a 914 for a recent project. With a base price of ~$32-34k plus an IFA which is as good as mandatory for a turbo I was looking at around $40k plus custom engine mount plus rooting around fitting it.
I know it's not a turbo but a Jab3300 gets more 5-10 more horsepower for circa $17k with prop.
Fitting a new CAMIT 3300 to throw away at 800 you'd be looking at $20 an hour.
Running off a power by the hour concept, $20 is quite reasonable.