In Need of Alot of Advice

[Zoaelite]

Why don't you just keep the skimmer you have now? (Forget this if it wont fit) You have to remember that whether its a 50G or a 10000G as long as your not adding livestock to the tank your bioload stays the same. Sure it might take longer for the skimmer to filter all the water but it will still do it. Same thing with the water changes, although you will be increasing the change a little theres no need for a massive difference (Because your bioload is staying the same)
Levi