Playing with the Big Boys

I finally finished my killer cover letter, it starts

Dear XX, I realise in your position at XX your time is precious and you receive a plethora of emails daily. However, please allow me 3 paragraphs to prove I am far from a time waster.

Boom. So today I've been sending out applications to the biggest fashion PR players in London. As I was sending I could see that I was getting messages back at the same time. My heart sank because the replies were so fast there's no way they could be good responses. Hesitantly, I click 'open'..
'Would you like to interview with regard to an internship?'
'Thanks very much for your response. I would definitely love to interview.'
'Free at 4:30pm on Tuesday?'
Oh shoot I have lunch with Alexandra Shulman and Sarah Burton.
Of course I'm free.
As always, not naming names, but I have an interview with an account manager working for one of the biggest global fashion PR companies in the world. I'm talking London, NY, Paris, Milano, Hong Kong.. Their offices are based in Mayfair, naturally.

Despite my excitement and willingness to intern (if you work with good people, its great and takes the pressure off - you're there purely to learn and be taught, which i adore) I do have reservations..
I spent 3 months interning and working my a s s off getting into huge amounts of debt. With no job at the end of it. Am I an idiot doing the same thing again?
It is a different situation I guess. This is a huge company. They wouldn't hire me because they hated me rather than couldn't afford me. I have no problem with that. In fact I'd probably rather that.
Being told 'We want you to work for us but don't have the budget' certainly does not pay the bills. Or keep me warm at night. And all other cliched phrases.
Also now I have this magical thing.. options..
I now have 2 potential 'jobs'. I can choose, keep looking for paid work whilst interning, and hopefully, one of these days I will work for someone and they will give me money in return. A novel idea.
One big shot replied with details of his agencies paid internship program, which sounds rather promising. Except then I have direct competition, which I don't love the idea of. I'm good at standing out from a pack, but I don't appreciate the variables in competitions - even MORE applicants to be better than, some poor slave of an assistant trawling through tons of applications, hating us more than she hates her job, so tired she starts picking out applications purely if she likes the applicants name.. I don't like competitions. I don't like relying on someone else to make my career. That said, I'll apply. Definitely can't hurt. Shall let you know how swanning around Mayfair goes next week, I'm off to party for the weekend. x x