[closed] Overpass API how much hardware is enough?

Hello, I'm trying to decide what server setup (hardware) to buy for a local Overpass API instance. Would anybody mind sharing their current server specs for their own instances and some other information, such as number of concurrent users, maximum bandwidth, amount of RAM/ number of cores, SSD vs HDD etc?

I couldn't find much information on the public instances other than:

Name    Data coverage   Endpoint    Version     Attic data  Hardware    Usage policy
Main Overpass API instance  Global  http://overpass-api.de/api/     0.7.52  Yes     4 physical cores, 32 GB RAM, SSD    Both servers have a total capacity of about 1.000.000 requests per day. You can safely assume that you don't disturb other users when you do less than 10.000 queries per day or download less than 5 GB data per day.
Rambler Overpass API instance   Global  http://overpass.osm.rambler.ru/cgi/     0.7.52  Yes     8 cores, 64 GB RAM, hard disks

Taken from: http://wiki.openstreetmap.org/wiki/Overpass_API#Introduction

Does anyone have some more specific stats? The queries I'll be making are small 100m bbox queries mostly with around a max of 50,000 concurrent users. Could anyone please advise me?

Thanks for your time.