I'm soon to mount a new ptp link , it's rural between 2 villages. a friend of mine built a new house out in a small village where there's no internet, and since his house is new he also doesn't have a telephone wire so no adsl either.
i already have a longer link, 6km link from city to the 1st village. and from that place i'd shoot to the 2nd village.
i'd mount some of the spare stuff i have, and i have:
5ghz: rb911 + 19dBi box; metal 5 + 21dBi antenna; lhg5.
2ghz: sxt lite2, metal 2 + 19dBi antenna.

there's hills as you can see from screenshot. it'd be a temporary thing (a few years) before fiber comes to the villages. for now, 30ish mbits would be enough on the 2nd village, just to be able to stream tv normally and have some spare for browsing.
the link between the city (6km) goes about 90mbits each way. air is completely clean there, omnitik picks up just a few home networks.

i'd go 5ghz, because of higher gain antennas i have. any comment on this?
overall situation. the relay point is on the upper part of the image, the place where the long link ends and 2 shorter begins.

overview of the 3km link , new one to make.


overview of the longer 6km already working

stats of the 6km link


pole on the location i'm talking about. the house is on the very top of the hill , the pole is on top of a 3 floor house, i can see literally 35km all around from there.

If you are fine with the 5GHz equipment and dishes you have, then go for it. 3km should be no problem, and with 40MHz channels, I can't see why you couldn't get 100-200Mbps over that. Same for the 6km link.

Personally, I'd use 60GHz radios. Presuming they're available and you can use them in your country, Ubiquiti Wave LR's would be super solid at both distances, and you'd get near-gigabit speeds over that with 5GHz backup in case of rain fade. That would give you room to potentially provide service to more locations, too.

Starlink ?
It's meant for these situations...

I made a number of such links, and it always works if you have clear line of sight and clear Fresnell zone.
As far as 60GHz is concerned, 3km is just pushing it and I do not think there is really a need for it.

Personally, I have about a dozen of 3-4km 802.11ac links, several 10-15km links and 25-30km links. They are all stable but the speed goes down with the distance.
There are many online calculators that can help you with that.