Hello, I hope this message finds you well. Can I ask for some more specifics?
For instance, do you want to work with someone who will just define a target audience for you, and give you leads on everywhere you can find this audience, market to them, advertise to them, etc? Or are you wanting this person to find this audience, and then also market to them? Using how many channels (are you expecting someone to utilize various social media channels?)? Or, are you simply wanting a marketing plan written up by a marketing professional, that will give you a road map of how to proceed, and who to market to?
How long are you wanting to work with this person?
I can do a lot, as far as finding target audiences and places to promote a brand or service) in a few hours a week (so let's say for a month, that would be $500 USD) but these types of projects take time and it's important to have realistic expectations. A target audience cannot be found, targeted, and start bringing in income within a couple of weeks or a month. They can however, be identified, focused on, added (to your various channels: email list, FB page, visits to your website, followers on SM), and marketed to. The success of this type of campaign happens after regular, consistent research, work, and marketing over months.
I'd like to hear more, if you are interested in working with me-
Cheers
Brooke