Whats the best option for 1 Coax Cable?

Best option is a DiSEqC motor - I'm sure the forum sponsors World of Satellite will sort you out there.

Such a motor takes all its power from the 12/18V DC present on the coax cable. You'll need a perfectly vertical pole to mount it on, and plenty of patience whilst you adjust motor elevation plus dish elevation, and dish squareness to motor plus motor rotation on pole to get things spot on across the visible arc.

If correctly set up, it tracks the Clarke belt in space where all the satellites
are and as it turns the elevation changes.

dog-man said:

If correctly set up, it tracks the Clarke belt in space where all the satellites
are and as it turns the elevation changes.

Click to expand...

As well as that, the LNB skew tracks perfectly too, you'll see the dish lie more and more on its side the further from due south you go. A beauty to behold.

dog-man said:

If correctly set up, it tracks the Clarke belt in space where all the satellites
are and as it turns the elevation changes.

Click to expand...

and the bigger the dish on the motor the easier it is to catch those sats, but if you go big spend money on a dish thats light, ie aluminum

I'm a little rusty, it's been a few years since I messed with multi-sat, here are a few suggestions.

If you are happy with only the 3 "main" euro satellites,
Hotbird + the two Astras, this can be achieved with a multi LNB arrangment with a diseqc switch mounted at the dish end.

(say) 3x lnbs on a bracket, each aligned to a single sat with the selection/switching done by the switch at the dish end with a single cable downlink to the receiver.

most receivers can handle these switches.

If you want everything on your horizon, then the suggestions already posted are all good advice.

Good questions.
Polar Mounts for tracking satellites are the norm for scanning the Clarke Belt.
Once you get your equipment everything will fall in place.
Yes. The motor will have to be mounted on a perfectly level pole or on a perfectly level wall.
Next will be a perfect aim on one angle at the north star (northern hemisphere). You will need to use compensated angles if you use a magnetic compass. That part will also fall in place for the most part.

If you're familiar with telescope mounts there are Az-El ones and german equatorial mounts. But we're working with fixed sats in the sky. A mount like the Stab ones will track the satellite arc with the movement of only one axis. One motor, angles setup correctly, and a bit of final tweaking here and there. Pretty much like an equatorial telescope mount tracking the sun from morning to evening with just one adjustment. Easy.

Get your equipment, do some reading. And we can help with the rest.