That sounds like a great idea LisaMarie. It is best to make it do what works for you, rather than you try and fit it.
An advantage of doing it month by month is that when you get stuff you don't need to worry about just yet you have somewhere to put it. That way you don't have to keep thinking about it, or worry about losing it in the meantime! (Not that that would EVER happen here
)
Nat xxx