Hi @nesta and welcome to the madness (it's a standard greeting on here, as you'll soon discover once you get hooked on your Speedster!).
Your Nardi steering wheel will sell well to Mk1 MX5/Miata/Eunos owners, which will help offset the cost of the banjo wheel.
The one thing I will say having owned my Speedster for a couple of months now is that, being a self-build or even a factory-build, whilst these Speedsters may run ok, it's worth checking over everything mechanical (not just the pretty stuff) as only then will you know whether it's truly safe and reliable or is simply waiting to drive you to your first breakdown! You have no clue as to how the previous owners (all of them) have cared for your car.
I had an oil cooler hose perish only 100 miles after buying it, and the front brake hoses rub against the tyres on full lock. But the guys on here are really helpful and knowledgeable - it's a great place to learn. And luckily Speedster replicas are extermely simple and easy to work on.
Enjoy your lovely car on those beautiful Spanish roads!