Doing the 65k as three separate deposits within the month will be accepted but there is a risk that one may not go through or be delayed a few days and get deposited on or after the first of the next month which means you did not meet the requirements. Multiple small transfers will often be more expensive than one bigger transfer per month so, unless you are transferring your weekly income, I cannot see any benefits in doing it this way.
That is so that you maximise the duration of the visa as the 5 years starts from the date of issue so why apply more than 3 months prior to travel and lose those 3 monthsd?