If you’re in Eurorack with a budget, its super important to know what you want to do. So how do you want to expand on what you have? Sound design, sequencing, etc?
I don’t hear often that the more expensive modules are “overpriced” So I don’t think you’d be wrong for saving up. On the other hand, Doepfers do pack a value punch.
I don’t think you could put together a Mimeophone out of Doepfer modules. Maybe a DPO, but probably not, and probably more expensive and more HP (one cannot understate how great MN integrated attenuators are). So if those are what you want you might as well save.
Another question to ask yourself is if you really need new modules or you just want to fill your case. I ask myself this every time I enter ModularGrid.