Found the link I was looking for.....
Ubiquity makes a wide range of Long Distance Wi-Fi Equipment....the AirMax Line appears to include what you need:
[Products in Ubiquity Airmax Line + links to rest of Ubiquity Website]
[Specs for Nanoseries Line, incl. LocoM2]
The least expensive is the Ubiquity Nanostation LocoM2 for OUTDOOR use. Although in same 2.4 GHz Band as (some) Wi-Fi devices, it uses a different TDMA protocol/waveform/software and is NOT compatible with regular 2.4 GHz Wi-Fi Transmissions. Has TWO CAT-5 Ports...one to Camera and other to included 24 DC@0.5-A (max) to PoE Voltage Converter (LocoM2 draws 5-W out of 12-W max available): [PoE = Power over Ethernet cable]
[LocoM2 Data Sheet]
[Quick Start Guide]
[$48 each on Amazon, Range up to 10 km = 6.2-miles
[Two Pack....Amazon cost is MORE than individual.]
So Total Cost would be about $160-200, including Low Light Camera ($40, Q: Is included CAT5 Cable SHIELDED???), 2 ea Ubiquity LocoM2 (2 x $58, incl. 24 VDC to PoE Adapters and SHIELDED CAT-5 Cables) and whatever MIGHT be needed to connect LocoM2 to House Wi-Fi Network.
Another alternative you might want to look at is "similar" product from TP Link.....although it APPEARS capable of not only Long Range TDMA Mode, but also Standard Wi-Fi "11a/c" 5 GHz mode of operation, when we look at Specifications Webpage we learn it can NOT do BOTH Long Range TDMA and short range Wi-Fi modes at the SAME TIME....you should do further research to confirm it meets your needs:
5GHz 300Mbps 13dBi Outdoor CPE | TP-Link
[$57, Range up to 15+ km = 9.3-mi
Perhaps there is a single device that can operate on BOTH Long Range TDMA mode and Standard Wi-Fi mode at the SAME TIME....but it was NOT in the cost range I was investigating.....I'll keep searching. It would simplify connection to House's Wi-Fi Network without running a CAT-5 cable from Outdoors to Indoors (or mount LocoM2 in Window...May NOT be viable if Window is LowE (Tinted) due to RF Attenuation). It also would allow use of a Camera with built-in Wi-Fi....which would be mounted at Remote Location and PERHAPS use short range Wi-Fi to Long Range LocoM2 located in a nearby BARN??? [Is this a viable option????].
Instead, you may want to consider plugging in an OUTDOOR Wi-Fi Extender (or Access Point) directly to the House's LocoM2, sharing a PoE Power Adapter (i.e. presumably 120 VAC to 24 VDC, NOT included in LocoM2 above), rather than running a CAT-5 Cable from Inside to Outside....or mounting LocoM2 in a conveniently located window.