Apologies if this has been raised (& answered) in the past

I'm in the process of creating a Scratch project to interface to the real world where I need to monitor over 100 analog inputs.

My preference is to move away from using Scratch on the PC & use the Raspberry Pi - either way after reading many forums/visiting many web sites over the last few weeks - the best bet seems to be to interface the PC/Raspberry Pi to an Arduino unit & connect a shield with sufficient analog inputs. To date I have only been able to find a shield that offered 64 analog inouts (1/2 way there!!)

Is there somewhere you could direct me that may be able to solve this & I'd appreciate any advice

I'm more than happy to build up some ADC/MUX combinations but am very weak in the python/C# area to be confident of achieveing any workable interfacing coding in a timely manner