I would storngly suggest you to consider a 4th optinion which is much cheaper and with a higher chance of giving you return.

I've personally used this strategy to start my consulting business from 0 to 12 clients in the first 3 months.

Here's exactly what you can do.

How You Can Generate 5 to 10 extra Trial Customers per week using Linkedin

It is NOW the moment to leverage Linkedin’s full potential. In the future, this social network will start to get overcrowded (see Instagram and other ones that in the past were money-printers for the first ones who fully understood them.)

How to leverage Linkedin to generate leads?

1- Use your personal account to post relevant content. Don’t put external links (if you really have to, write them in the first comment and tell people to look at it) as the post which includes them are penalized by the Linkedin algorithm that tends to make people remain in their platform. Use Quuu.co. if you want contents related to your niche posted every day on your account, but don’t expect an engagement from those. The best posts come from your stories, what you’d learned, and they give the hell out of value to your audience.

2- Select your target audience. Just hit the search button and look for the location, title/position, etc. where your leads are.

3- Optimize your profile. Treat it like a sales letter, but more related to your person. Firstly, write something eye-catching on your headline, for instance, “Contact me if you want to generate more leads for your B2B Business.” Then the first paragraph should be customer oriented (explaining the benefits of working with you/your company.) After you can tell more about yourself, and of your story if you’d like to.
You can check my profile to have some inspiration.

4- Start with the automation. Download “Linkedhelper” (better) or “GPZWeb” (still good) to automate the following actions:

- Profile Views. People will visit-back and see your “optimized profile” (see point 3.) And many times they’ll contact you.

- Connect with 1,000 People, including a 1 line message (less-salesy messages get a higher-acceptance rate.)

- Send a Direct message with an intro summary & calendly/ web/email link to everyone who accepts (better if you wait one day after they accepted your connection request.)

** MAJOR KEY ALERT**

A high-quality copy of the message is KEY to succeeding. Try to stand out with humor or creative ways (thanks, Jon Buchan). I get five messages per day from people pitching me SEO services which go straight to the trash bin, while my messages, not to brag, get a very high response rate

Reply to your messages, and watch the leads roll in!
I repeat! Linkedin (and his automation) will soon get less effective as more and more people are starting to do it. So, do it now (the same applies to Facebook groups, see the third paragraph) and you’ll be ahead of 99,9%.

Another thing, stick to the limits, check the Linkedhelper knowledge base for that.

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If you want support in implementing this strategy, just call me here on Clarity :-)