If we have a certain budget/amount of hours we can spend on a project, and we don't know how many issues will there be in said project, can we somehow limit how many working hours can be logged for the entire project, so that the users can't log hours exceeding the limit? We are also using Tempo plugin.
I believe the admin will need to make time tracking mandatory as well as specify an Original Estimate for a given issue.
Prior to logging work on an issue, you may want to specify an Original Estimate for an issue (i.e. the total amount of time you think it will take to resolve the issue).
When work is first logged against the issue, the Time Spent is subtracted from the Original Estimate and the resulting value is automatically presented in the Remaining Estimate. When subsequent work is logged, any Time Spent is subtracted away from the Remaining Estimate.
See Specifying time estimates here for more details:
You might also be interested in the User Reports that compliment Time Tracking:
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