Convenience is the tradeoff with P2P. AutoBuy/Daily purchases won't be feasible.

For something like nostr:nprofile1qqsgqfapsalnnesrmt7xxfu7qp95akwlscw33n5pm8zrclt3xhdg7egprdmhxue69uhhyetvv9ujucnfw33k76twwpshy6ewvdhk6qgawaehxw309ahx7um5wghx6at5d9h8jampd3kx2apwvdhk6tcpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhscyvr9p you might need to do a single monthly purchase when on-chain fees are higher. Also in general with P2P larger (pleb size not whale) less frequent purchases are a better way to match available liquidity.