Doing a rare type would be good.
Regarding the Mk1, having a budget is a very good idea! Last year, at CockpitFest, I hatched a dumb idea to create a Spitfire Mk1 cockpit slice thru….I had over 3/4 of the internals already and sold a Hunter cockpit (complete) to fund the difference – ouch is all I can say……. lots of time and money.
Happy to help with what I can tho’. Some parts you will likely have to buy in….such as the perspex for the screen/canopy and castings