I'm finishing my master's degree in bioinformatics from the UK now and would continue for a PhD in either CS/bioinfo afterwards. During the PhD, I would also like to try to slowly bootstrap an Internet startup idea that I have in mind (not related to bioinformatics). My question is, which country would allow me to do graduate study while working on bootstrapping the start-up at the same time? For the UK, at least, people on student visa are not allowed to work on their own business during the course of their study, which is why I'm thinking of leaving after the master's. I'd considered the US too but the multi-decades timeframe required to complete the grad study there is quite scary.
Also, my current citizenship is Indonesian, so I could encounter visa restrictions for working in many western countries. Regardless, I hope this questions might be of some relevancy to others who're in the same situation as me.
PS. The matter of finding a suitable advisor in that country can be considered to be outside the scope. Thanks!