Paul: spend the time you have now learning all about the exotic species you want to keep. Learning about them and preparing yourself for them isn't as fun as having them but it will help you pass the time -- education is key to being prepared. Being prepared will increase your chances of successfully keeping a colony of ANY kind of ant be it exotic or native.
One thing you really need to do early is design their nest, making sure you learn how to keep the temperature in the nest within the right levels. I've kept lizards before and it takes a while to adjust lamps and heating pads and read thermometers all day to make sure they are emitting the right levels of heat.
Designing the nest is something I enjoy a lot. It takes a lot of time and creativity but once you see your ants in the formicary, you'll see it's time well spent.
Something no one seems to be telling you is that you'll never be 100% prepared for any ant species. You can only learn what you can and hope you're doing your best. I had a friend named Chris who was very knowledgeable of harvester ants. He read a lot about them but never had a colony of his own. When he finally got his hand on a colony the ants began to slowly die off and soon the Queen died too. He did everything he read was right, he thought he made a good artificial nest but the ants just died off. No reason.
Camponotus ligniperda are nothing like polyrhachis so its really a catch 22 situation where people are telling you you need experience when the only way to get experience is to raise the ant you are unexperienced for. My advice would be to learn as much as you can and when you feel ready, make the move to get your ants.
Best of luck, mate!