While SAP Solution Manager is a fine solution for monitoring for large companies that can afford the overhead, 1st Watch is intended to be a lightweight but capable system that is easy to install, maintain and update. The system can be installed in a week and is very economical (see Pricing Page).
Yes, 1st Watch is totally scalable in this way and can keep the various landscape logically separated, but also represented on one report or dashboard. This is how we do Managed Service Provider monitoring also.
We do offer access to extensive help documents, a sure forum and a help-line. The system works out of the box and isn’t complex enough to require training by the general user. MSPs can get training on how to run an 1st Watch installation as part of their onboarding and continued support.