Platform As A Service (PAAS) providers can often have lurking in their contracts severe penalties for RAM hungry applications such as QlikView.
Not all providers have updated their contracts to take account of the fact that they can acquire RAM for buttons.
It is worth checking this out with your provider before you sign for a PAAS service, ad-hoc or fully outsourced.
I would be keen to hear of any hosting provider that has pre-built solutions that are RAM friendly and also have choice of server to comply with QlikView MTRs.
We could name and shame the bad ones too to help them realise that they have clients that will walk if they do not fix the problem.