Space? My garage is 5m x 4.5m.
You're about right for some builds on the price. Some can be well over $100k. I reckon a few of the build kits, if you did want to build, might be less than the $70k. They were when I researched two years back. As usual it depends on your spec and what you do yourself. Most of all how good you are at making yourself forget what you've spent