Make sure to offer pricing and maintenance based on the size of the organization. Even though there is no per seat license fee for MediaWiki (as FOSS software), you still need to charge your maintenance or subscription fee according to the size of the pocket book and will have expenses or overhead according to the size of the customer.
Note that Amazon charges $15,000 a month **or more** for Enterprise level support that promises 15-minute response times and a "concierge-style experience" with an assigned Technical Account Manager. [https://aws.amazon.com/premiumsupport/plans/enterprise/ Learn more]. Also, take a look at their [https://aws.amazon.com/outposts/rack/pricing/ pricing for '''Outposts'''] - their rack on your premises. How does half a million dollars sound for 3 yrs storage?<ref>{| class="wikitable"|-! Resource ID !! Description !! Configuration !! No Upfront !! Partial Upgront !! All Upfront|-| OR-S4GAYMV || Storage optimized medium unit, used for data-intensive workloads such as relational databases and data warehousing || 3 I3en.24xl || $15,990.57 monthly || $266,509.57 upfront, $7,403.04 monthly || $501,038.00|}</ref> {{References}}
