Got any product you can sell directly? That same $3k budget is $90,000 monthly if you can get the money deposited daily into your account and re-invest.
I agree:
Here's a quick snapshot of a recent campaign I built from scratch selling an actual product. Spent WAY less than $3k before I was in the money.
Got Merchant Account (Less than $50 for everything - Set up in like 1-2 days)
Domain Name: $9 namecheap
SSL Certificate: Free with domain
Website: I have a designer on staff, but it prob would've cost around $500 or so.
Programming the Merchant Account gateway: I spent like $300 on this because I wanted it custom, and easy to work with.
Autoresponder: $150/year at GetResponse. Spent a little time putting together a good sales follow up campaign.
Customer Service Software: You can get it free I think, but I found one I like for $40 a month, that has live chat (rarely use) and a ticketing system.
PPC: Found a few High CTR (one keyword gets 33%), Decent Traffic(Getting around 2-300 hits a day), High Converting (5-10%) keywords. Spent between $30 - $100 or so bucks a day during testing.
Daily profits around quadruple the ad spend, and... over 10% returning customers from the followup emails (within a week).
Merchant account hits within a day or two, which made scaling easy and quick.
(NEWB NOTICE: I've done this shit a lot, so this was NOT my first campaign... I don't know if it would have been as smoothe and quick to profit if I was learning while building.)
Good luck whatever you decide to do.