could not find any info in the docs or specific details about expected data rates or compatibility with my mini-GBIC module,
guess it’s best to ask someone who has the device operational.
That SFP appears to be a generic 1000BASE-BX10 device with TX 1490nm / RX 1310nm so should work in Mikrotiks SFP ports. Until that particular combination is tested there is always a small possibility of an incompatibility due to differing interpretations of the standards.
The original hAP AC does not have a particularly powerful processor so would likely struggle to achieve full gigabit throughput. You could use a non-wireless device with an SFP port as the router such as the hEX S (better than hAP AC CPU but may still struggle) or RB4011iGS+RM, and then separate APs. Mikrotik do not have anything which supports wave 2 or WiFi 6, currently the best is WiFi 5 / AC1200 which can do 867Mbps in ideal lab conditions.
Agree for fiber you have 3 choices, medium, high, premium
RB450Gx4 routerboard (wll need case+powersupply) / RB4011 wired only / CCR1009.
Anything less is a waste of your 1gig fibre.
For WIFI, you can get decent stable wifi5 products out there, and not conversant yet on wifi6 products that are best bang for the buck, too early to tell.
Why would you want to BIND/TIE/RESTRICT a router purchase on the basis of WIFI.
The RB4011 will easily last you 5-10 yeara. WIFI could change a number of times between then.
I would get some TP LINK eap245s with an RB4011 and simply be up and running tomorrow.
1gbps on AC is an unrealistic expectation, and physically impossible with the 2x2 card you listed. The most you can expect is ~400mbps real-world throughput at 2x2 80 MHz MCS-9. Mikrotik products like hAP AC2/3 and RB4011 can achieve this. I don’t think anything supports 160 MHz currently which would be needed to break 1gbps.
Though as others have said, I would avoid Mikrotik wireless, the drivers and technologies are far behind other vendors these days.
Why would anyone put their testicles (gonads to be appropriately diverse) in the hands of an ISP.
The only thing they should supply is the public IP. I would never consider having an ISP router in place.