we are talking about wisp therefore my suggestion using RB800 because we are handling minimum per AP 50client.
how many basebox can handle client..?
i dont have experience with basebox need advice for best AP especially mikrotik.
rb800 is an old way to do things
i refer to the model of one CPU with many radios, that was valid an very popular decades ago but not today
nowadays designs have migrated for single Radio per equipment to improve performance and isolate radios between them, preventing self interference
finally rb800 gets you an expensive less performance solution than separated equipment:
for example you get a rb800 and every thing you need to get 4 radios operative with 19dbi 120° antennas you spend close to 1.200 US
instead of that you get 4 mantbox with the same antenna plus a powerbox pro to power it in group you spend only 900 bucks and get best performing solution without the hassle of managing pigtails from radios to antennas