Here's another view.
Find a car you like.
Approach the owner and see how much it will take for him to part with his pride and joy. In spite of what he or she will tell you, most, not all but most of us have a price. The only question is how much.
When he or she gives you their price don't stop to think, don't hesitate, don't say well I don't know or let me think about it. Simply hand them the cash, turn the key and drive away happy. Broke and tormenting yourself about spending that much money, but happy just the same.
This way instead of your dream car bleeding you to death (cash wise) a little at a time over a long period of time, you take the hit all at once and get it over with. This way you only have to answer to your wife once instead of several times over the next few to several years
Besides a couple of weeks of driving the car and associating with this group and you'll forget all about the expense it took to get you where you are.

The complaints about how much you spent will be drowned out by those ceramic bazooka's as you cruise happily down the highway.
The little cars are just that much fun to own and drive.
Now if you are a glutton for punishment and are prepared for some frustration, and a lot of hard work, start from scratch. But be prepared. Although these little jewels look simple they are quite complex when it comes to putting one together unless you don't care how it looks. And trust me, WE all care. There are no straight or plum lines anywhere. No flat sides, bottoms or backs either and even the kits don't always fit like a they are supposed to. But if you have the stamina, physically, emotionally and financially one day your buggy dreams will become reality and when someone asks."Man that car is awesome. Did you build it." You can reply simply "YEP"!
Best of luck to you in which ever road you travel down. And like the others have said between all of us we have encountered most every question you will come up with so don't hesitate to ask for help or advice.
Phew, that was a mouthful!
