The budget isn't necessarily fixed; I am willing to pay more for a device if it has a significantly better price-performance ratio.
Unreasonably large throughput isn't necessary, but it should be able to handle <4 devices watching 4k videos.
It doesn't matter too much if it's unidirectional, but a decent range is a must.
You didn't specify wall/ceiling mount and/or PoE-powered. If neither is required, you can usually get a set of three ZyXEL WSM20 (Multy M1) for your budget (AX1800).
PoE is preferred. Ceiling mount would be nice, but it's not critical.
I've currently got an EAP615-Wall mounted in the center of my house's outermost wall and a TL-WRxxxx for my backyard workshop. It copes just about fine but I'm wondering if there is something better available at a similar price-point.
What can you say about the range of the APs you proposed?