100 per week - lets say 400 per month and you're saying that it'll take $7k/month in advertising to get 400 customers? So that's $17.50 of advertising for each customer you bring in?

I think the math is off, as there's no way we're spending that much money on our advertising. Even if you were to say $5 per customer, that's $2k in advertising (if you were to get every customer).

What market are you targeting with $7k/month? Dedicated servers, shared hosting, reseller hosting, VPS's? I can do some serious damage with a $7k budget. We spend less than $1000 currently.