Hostapd, as the solutions I have seen are using it.

Udhcp instead of DHCP.

We have control over kernel, so we will discuss kernel configurations a bit so that you are able to enable your device.

We will use systemd. Until now, we have been using SysVinit. To get a flavor of systemd, this seems promising for the future.

We will create a recipe to copy our configurations related to the required packages to rootfs.