Also be aware that you probably won't deposit each $ separately, won't buy BTC for each $ separately and the withdrawals to your own wallet are not cheap, hence you'll have to check all the fees involved and plan accordingly. For such small amounts the fees can be a big problem, especially if you are not super-careful.
Exactly. Also I wonder what the fee for 1 input and 365 outputs (1 year) would be on noncustododial wallet. It would be better for Maliceprime to have weekly or monthly saving plan in a way this can be achievable.