As much fun as it might be to build and fly, I'm pretty sure it's out of range for me.
Just a turnkey Chev LS engine (for ground vehicles) seems to be about $12,000 US. No gerarbox, no propellor, no airfame, none of the many other bits, just the engine.
An aviation LS seems to be 4-6 times the cost.
https://www.kitplanes.com/2016-engine-buyers-guide/
Based on some reading about homebuilts, and based on the rough ratio of engine cost to airframe cost for lesser airplanes, I would guess a total cost of $125000 and up depending in engine choice, avionics setup (can be well ove $10K) etc..
More research came up with
http://www.campbellaeroclassics.com/id56.html which gave costing information as "
Pricing: Mk26B (90% scale) - US$165,000 kit only.
Contact us for modular kit pricing, fast build kit pricing, and other options pricing (engine, prop, avionics, etc)" I assume in NZ$.
Consistent with my stab in the dark of $quarter million plus.