how much would it cost usually, not no cheap solutions either, but to get a few dedicated servers plus get a multiple OC12 Lines running into a server to make it efficent?

I think your question is unclear. What do you mean efficient? Please rephrase this question - would love to help!

You want to build a datacenter or lease in a facility with redundancy?

OC/12 lines do not "plug-in" directly to servers, they go to switches which usually go to other switches which go to your server.

-Matt

not even a data center, just leasing a facility

Lets start with these 2 questions.

1. What is this for? 1 site or multiple sites?
2. How much bandwidth do you actually need (actual)?

LOL - multiple OC12 lines... laughed so hard I thought I was going to start crying...

Seriously... you don't need OC12 lines for a few servers... one OC12 line costs over $125,000/month and is a 622 Mbps connection. I think you need to do a little research about networking and connectivity before jumping in talking about something you really have no clue about...

i would start out reselling to learn the trade

Typically if you get dedicated servers, your provider will handle the connections with the bw providers. Choose a good provider with plenty of available bw.

Here's a bw myth. A large line isn't necessarily better than a small one. For example... Company A has an OC3 (155Mbps) and they have lots of customers. Typically their line runs at 90% capacity. Company B only has a DS3 (45Mbps) but they run at 40% capacity. You will have more room to burst with Company B and therefore Co B would be a better choice.

An OC12 takes a special router to connect to it and if you want multiple you will need high power routers. One server or even 5 servers could probaly not pump out enough bandwidth to justify that size of a pipe.

Again, pick a good provider with good bw vendors that has plenty of available bw for your use.