This thread is the perfect example of why we are all here!
A great first read for someone about to dip their toe into the madness.
I would add one more piece of advice, actually it's only one word: patience
Whether you end up spending $20k up front and invest a lot more time and money, or spend $90k (and up) and drive out of the shop without a care in the world...take your time making the decision.
I've been involved in the hobby for years; built my first kit in 1982 (an MG TD) and (perhaps surprisingly) she is still on the road.
But I hung around with these guys for years before I bought my 356 roadster. I saw a lot of cars. I talked with the major manufacturers. I talked with dozens of owners. I saw a lot of cars. And got to drive a few (thanks guys!).
At the end of the journey, patience paid off. After missing out on a few "good deals," I stole a seven year old IM build with only 2,500 miles on the clock, for less than half of what a new build would have cost me.
And I get the same support from Henry and his IM crew as I would if they had built the car for me. In fact, Henry helped me find "my" car. You'll get the same treatment from any of the top manufacturers.
So...welcome aboard! Keep asking questions and you'll receive a lot of guidance on your journey into the madness.