Id like to know if its possible to study part time at the ETH (a BSc), since I will be working full time, I know it may sound hard to do it, but here in Buenos Aires and in Mexico is a common practice to study and work the BSc.
Please let me know your thoughts/experiences/recommendations
It used to be that this was not possible, and my understanding is that this is still the case. On the other hand, some advanced degrees can be taken on a part-time basis. Relevant link for prospective students: http://www.ethz.ch/studies/index_EN
In any case, be aware that the main language of instruction in all Bachelor programs is German.
I think I will finish a distance learning course (BSc) from the university of London and then apply for a masters at ETHZ, I think that could be the best approach for my case.