IM Service vs Building Web "Real Estate"

Hey Warriors!

I am just about to start my local business but have a little problem with my strategy. Maybe you can help me out. I think there are two different strategies which I could follow and I don't know which one is better, or which strategy you guys follow?

1. Internet Marketing Services:

what services?:
- SEO
- Article Marketing
- Video Marketing
- PPC / Facebook Ads
- Lead Generation Page
- Autoresponder
- etc...

With Internet Marketing Services I will provide my service for THEIR Website and will try to get them more customers and traffic for their website.

pro:
- I think I can negotiate a good fee and can price my services very well.

contra:
- I don't like the idea, that if the business do not continues to work with me, that I will lose all the SEO rankins I built up and also the list of Leads I generated.
- I don't really know how I can get a monthly fee from them, because at some point my work will be finished??

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2. "Web real estate"

With web real estate I will do all the things I said before, but I will do it to built up my "own property".

So right now, I am trying to figure out a way in which I do have control over the website and above all over the list!
=> question: I don't really know if the offline businesses do see the value in the list and want the list if they do not continue to have my IM-services. So what do you guys do? Do you always have control over your Offline Niche List??

The problem is that I don't know how I can justify that they will "only" rent my website and that they don't have control over my list..

pro:
- I think it is perfect to have control over the website and the list, because if the clients don't want to work with you in the future, you can easily go to another client
- When you do work for your website, it will never be lost and always improve your web "real estate"
- You will have a monthly fee and therefore steady income from your website!

contra:
- I think you have a harder time to get the deal, because it is obvious that it would be better, if they have their own website built up??? (Although I don't know if it is SO obvious???)
- Maybe you can't justify so much money for you website rental?
- What will you do if they already have a (somewhat successful) website??

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So maybe you guys can help me out:
1. Which strategy do you use??
2. Do you see other pro and contras??
3. How can you keep control over your list and your "web real estate"??
4. How do you justify monthly fees and how many months do your services typically go?
5. How do you package your services?? What is your typical starter package (e.g. Autoresponder + Webdesign for XXX$) ?


I would love to hear from your experiences and opinions.

Thanks,
Ben