Just to let you know that Mumara can run on a shared hosting plan as well. The size of home depends upon the number of people living in it. It all depends how widely you want to use Mumara. Sometimes a shared hosting plan is more than enough and sometimes you may need a 2TB RAM Server with more than 100 cores. Comparing to 100k/d, you may need a better server for 10k/d if you plan to create segments, triggers, drips etc. So it all depends how you evaluate things or you can take an expert's advise on it.