IO Train ?

what do you think of the IOTRAIN

what alternatives are there to multiply the number of anlogue inputs ?

is it just easier to use a mega ?

As I see it, it is what it is. You need to consider the cost factors.

I see no reference in the description to analogue inputs. If that is what you need, it may be possible to alter its firmware to provide some ... perhaps.

And yes, a mega will likely be much easier.

I don't understand what your problem / question is. Please be more specific.