As of this writing (10/2/07) I've been knocking away at this for about two months. I presently have a grand total of $1.46 in my paypal. THAT is my advertising budget. As to the fate of the rest of it, I've bought the internet version of the Brooklyn Bridge more times than I'd like to admit.
The sites in my list are my favorites. They are click for credit sites which give you the ability to accumulate credits which you can trade in for advertising. Your only investment is a bit of time..as you can.
Also, if you are a stone cold newbie to internet marketing you should consider the networking community(s). All have advertising available, even for the free riders plus you get the advantage of having qualified and experienced folk to assist you in getting your enterprise(s) going in a profitable direction.
Feel free to come by my place and check out my list at your convenience..
http://sammiesdad.friendlyfirm.com
Thanx and, as always, enjoy!