100k visitors per day is 4k visitors/hour is 1.2 visitors/s. Suppose each visitor clicks on 10 pages (that is very high) and you get a total of 12 requests/s. Now even assuming much higher load during peak hours you're still looking at max 100 requests/s.
My point is that that kind of traffic is truly minuscule. As long as you set it up correctly and use a decent cache it will handle the load fine. Any platform you choose and hosting for ~$200/month will be enough.
My point is that that kind of traffic is truly minuscule. As long as you set it up correctly and use a decent cache it will handle the load fine. Any platform you choose and hosting for ~$200/month will be enough.