Reddit mentions of Ubiquiti Networks UniFi AP AC LR, Dual-Band 24V passive PoE, UAP-AC-LR (24V passive PoE Indoor, 2.4GHz/5GHz, 802.11 a/b/g/n/ac, 1x 10/100/1000)

> wireless issues at night

Consider a new Wireless Access Point.

https://www.amazon.co.uk/Ubiquiti-Networks-UAP-AC-LR-802-11ac-Dual-Radio/dp/B016K5A06C/

Se vuoi sfruttare la connessione l'unica è cablare.
Se vuoi/devi restare sul Wi-Fi tieniti il loro modem e mettici in cascata un AP tipo Ubiquiti Networks UAP-AC-LITE https://www.amazon.it/dp/B016K4GQVG/ref=cm_sw_r_cp_tai_VGp9ybMBRPJSM o il modello Long Range Ubiquiti Networks UAP-AC-LR https://www.amazon.it/dp/B016K5A06C/ref=cm_sw_r_cp_tai_mHp9ybT10149S

for Acesspoints I would look at ubiquiti. they have a hole range from jsut single band wireless n to wireless ac. I would probably get this one for that many connections. http://www.amazon.co.uk/Ubiquiti-Networks-UAP-AC-LR-access-point/dp/B016K5A06C/ its 15.95 more then you are looking for but will work great. I currently have one of there older ones serving up about 60 devices at a local church i help out at. to set it up you install a peace of software on you computer that doesnt need to be always running. and then its good to go for use.

Again, those are the old models. They are not the products being discussed. This is the current LR https://www.amazon.de/Ubiquiti-Networks-867Mbit-passive-UAP-AC-LR/dp/B016K5A06C

Also you don't understand the difference between bands and antennas. Even the old LR you linked has more than one antenna, but still only one band.