Any mains powered zwave device is a repeater, but 75 meters is indeed a lot.
There is a maximum of 4 hop devices, so a powered device every +/- 15 meters as the minimum to reach the 75 meters is putting the range of every device to its maximum, if there is nothing in between.
I would personally not even try that, as even a rainy day can mess it all up.
Only viable option is to keep your HC lite, or buy another Homey which you would couple the same way as the HC lite, so with webhooks
Didn’t look up the IP-classification but would not use these outside unprotected.
Keep in mind that this product is designed as a plug which makes it a little harder to put it away in a switch box.
Perhaps you can make the best out of the situation by installing some Fibaro Switches/Dimmers.
These can be placed in a switch box more easily and you can probably also automate an outdoor light with it.
Homey wont even connect to the AEOTEC range extender 6, been trying for hours now.
Adding… then it fails and again, removing z-wave device and re-adding. It wont pick it up, also not when connected within 1 meter from homey.
Tried all that as said above (reset, fully) re-adding it again with 5cm next to homey, same result.
It says ‘adding device’ and then time out or no z-wave device added
You can also get outdoor antennas, but I don’t know how to use them with Homey or a compatible device. Unfortunately you can’t connect an external antenna (except the mod).
This information was the reason to help you with z-wave devices/possibilities.
If you want to use Shelly devices you have to switch all your devices in the guesthouse.