Which tool to choose for database based ezine?

Question

excel

What we have:
A certain exel table in the shared mode, in which 50 people can work simultaneously. The total number of Users is about 800. In fact, the log is filled in sequentially.
Pluses - ease of filling by the user (there is a possibility of multiple filling), ease of working with the tool (no super skills are needed), friendly interface.
Cons - it constantly flies (data is lost), incorrect filling by users, the process of uploading data is complicated (each month has its own table), if someone has set a lock, the work has stopped.
What you need:
A tool with which you could leave the pros and get rid of the cons. I ask for advice.

Answer 1

Google docs?

Answer 2

Cons - it constantly flies (data is lost), incorrect filling by users, the process of uploading data is complicated (each month has its own table), if someone has set a lock, the work has stopped.

+ Possibility of OFF-LINE work.
1. Provide and implement synchronization of client bases into a single one on the server.
2. Correctly organize transactions (to prevent blocking and data loss)
3. Find a freelance encoder to perform steps 1 and 2 (ie, to create all the functionality).