The AKG C1000S uses an internal battery so phantom power is not needed.
You will still need a pre-amp, but many recorders now have some kind of pre-amp stage so you may not even need an actual separate device.
If you decide you need a pre-amp, I would recommend the Denecke AD20 as it allows both analog line out as well as digital line-out. As you upgrade, you may want the extra features.
Also, the Rolls Pre you selected only supplies 21v Phantom Power. You may want to select one that provides 48v phantom as that is the most common voltage used. The Denecke PS2 is a good choice here, but if you go with the C1000S mic(s), you won't need the phantom.
Just some initial thoughts...
Terry
PS Take a look around Yard Sale. There are a lot of nice items coming up for sale all the the time, some you may find within you price range.