Check with the post office to see if they will allow this.
IANAPC (i am not a postal carrier) but typically you can't change your mode of delivery without permission, and permission is not typically granted, and even though to you and me there doesn't appear to be any change, your carrier might get his knickers in a twist, hold your mail at the post office, and stick a form with a picture of a broken mailbox on a post on your door.
It all hinges on whether they decide your delivery is 'city' or 'rural'.
Where i live, the USPS would like to see all individual mail boxes (and slots) completely gone. They have tried to convince entire neighborhoods that they need to drive down to the mail kiosk at the new condo development to get their mail. When people move into a house with a mailbox attached to the house, they tell people that the law requires them to install a mailbox at the curb - which is a lie.
The long & short of it is, there's a federal law that says that the domestic mail manual is regarded as law. And another federal law that says that changes to the DMM have to be approved by congress. And the post office sometimes doesn't really agree with the DMM or finds it inconvenient, and just tells people whatever they feel like telling them.
If you're sure that you're within the requirements of the DMM, and they say you aren't, threaten to complain to the district manager. And make it clear that you've read the manual. The district manager is the man they don't want to hear from.
So, good luck with it. fwiw you want section 508 of the DMM.
DMM 508 Recipient Services