Quote from rpetersson:
"In principle it's a simple construction."
Please forgive a slightly frivolous comment from a non-engineer, and I realise it's an axial-flow engine you are attempting to build, but no doubt Frank Whittle would have said something similar when he was trying to obtain funding to build his first engine (not sure how his German equivalent would have phrased it)...
Lycka till!
PS: What's the melting temperature of steel, and what materials might you be using for the cans and the turbines?