Budget: 800 UAH Deadline: 99 days
The task is described quite generally. What software and OS are we talking about? How long ago were they updated? What database are we referring to? How does the application connect to it? I see two separate projects - security audit and database server allocation. Based on this description, it is impossible to discuss costs and timelines.
I suggest formulating the project goal and proceeding as follows:
1. Audit of the existing infrastructure
2. Security audit
3. Database server allocation
Timelines and prices are discussed separately for each stage. If the infrastructure is small, item 1 can be free of charge.