Why do you need this OP? By this I mean could you not do this on your own? How difficult it can be to set aside some money each month to invest in bitcoin and then buy it whenever you have some time available? To me that seems like the easiest thing on the world as you do not really need the help of any exchange in order to achieve this, also as it has been mentioned never rely on the security of an exchange, as even if you were to use a good platform the risk of your coins disappearing is always there.