As I am exploring material simulations one really hard truth that I have realized is that my gaming laptop is not at all gonna cut it for my research work. Currently I am trying to find the absorption spectra of a Quantum Dot which has 45 atoms in total and I am using PBE functional(so not that much accuracy). The geometrical optimization converged after 10-12 hours but running the executable for absorption spectra (turbo_lanczos.x) did not go that well. The computation ran for 23 hours after which my laptop gave out.
So I am looking for clusters which do not burn a big hole in my pocket. AWS and GCS came first to my mind. Although I found a tutorial(http://star.mit.edu/hpc/documentation/ec2scripts/) for running on AWS I am not sure how do I know how much cores, Nodes, RAM or instances do I need. On the other hand I can not find much information to do the same on google cloud.
Could you guys help me with some guidance.