Questions before buying a Miata

Hi all, I am considering buying a Miata and I have several questions I
hope you kind folks can answer.

For the past decade I have driven Honda hatchbacks, which I like
because they are reasonably small, durable, fuel-efficient vehicles
that handle well. It sounds like the Miatas meet those characteristics
-- and I am now looking for something smaller than the Hondas.

>From consumer reviews I've read, the Miatas are also durable,
long-running, reliable and reasonably fuel-efficient.

Here's what I would like to know:

How long is the average lifespan of a Miata? How much more can I expect
to get out of one if I buy it at 100K miles? 125K? 150K? (I've seen
some at nearly 200K). I know it depends on how it's been driven during
those miles, but I'm trying to get a ballpark idea.

What are some of the unique expenditures Miata owners have to
undertake? For example, I understand the back windows tend to fade and
need replacing. How often? How much does that cost? What other sorts of
things, particular to Miatas, bring an added cost to the owner?

If I'm shopping for one, what are some of the particular weak spots on
these cars I should look for, above and beyond the usual engine checks,
tire checks, suspension checks and so on?

Also, in your experience, how much does it cost to insure a Miata in a
major city if it's a female driver being insured?

The reason I ask is that I've seen several of these cars in my price
range (under $3500) but they are older cars. The car I'm giving up now
was also older and in bad shape (compared to other cars of its age - a
Honda at 136K miles is by no means an old car). I'd like not to spend
thousands of dollars on repairs immediately if I can avoid it - I'd
rather make a wise buy, of course.

Anything else I should know?

Thanks so much. I'm excited by the prospect of owning one of these cars!