I'll try to get some referrals for you. But try the social forum first.

Here is a link to the warrior forum social media page. Copy and past your blog post into the discussion forum. Use the same title as the title for the forum post. there are many there that can help you find a social media manager and even give you some strategies to work with.
Social Media Marketing Forum

The only social media manager that I am acquainted with would probably charge you 2K a month to operate your campaign.

No clue. But you can probably find one here at the warrior for hire or you can try elance dot com. I think it will be your best bet.
Then go to the copywriters forum and find a copy writer in your country. They are there just watch their sig files and get a consult from one of them.

Save your money. Don't do any contest until you know what you are doing and have a game plan. marketing is measurable, any thing else is just public relations.

Nike ads are public relation ads. If you continue to do what you are doing you will go broke and have no customers.

It sounds like you don't even have a campaign. Social media is a great way to brand yourself locally, face book allows you to have a business page. from there you need to do a search on face book and find your local market.

There really is no way to measure your campaign this way unless some refers a person that orally or in writing tells the reefers name.

Your best bet is to hire a social media manager to handle the social media campaign. Then hire a copy writer and marketing consultant to write a sales letter or post cards that you mail out to potential buyers. This will be a measurable approach.