Patience, young padawan.
The thing is, do you want to do all-grain or extract brewing? Exctract brewing seems a bigger thing in the English speaking world (UK and US) than on the continent. However, what I do see on this forum, are regular postings of people who have switched to all-grain brewing, and wonder why they have brewed kits (all though there seem to be some kits that are of high quality).
Try to know the amount of beer you will consume (taking into account friends and relatives). Know the amount of storage space you will need for the beer you want in stock. Do you want a regular beer to drink every day, or do you want to experiment with lots of beers. What is the minimum amount you can brew with an all-in-one system, because there physical parameters which make that you can not go under a certain amount of malt and water to brew (that is true for any brewing system).
Even if you buy a Grainfather, you would also have to add the cost of a cooling system for your wort (I think that is always separate from these all-in-one brewing systems), a grain crusher, if you want to control your mash better, also a pH meter. You will need a fermenter and bottling material.
I started with a small bucket-in-bucket system (also called zapap lauter tun), and even with a standard cooking pot of 10l and a sieve in my kitchen. And used an old coffee grinder (see my avatar) to crush malt. If you use your imagination, you can do a lot to learn, before you invest a large sum of money to buy materials.