If you know of a server with 14h or unlimited exhaustion during the weekend and 3h during the week, let me know!
That will be possible only with Update 10.2 when limits for exhaustion per specific day are possible. (Aside of a few modded servers that already have that, of course) I'm not sure how many servers will take a limited time during the week and unlimited on the weekend approach, though. Our official server with exhaustion will aim for 3 hours per week day and about 6 hours on weekends, time not used during the week days being able to be played on weekends.