[Pineapple Juice 12800 'Inline']

Just wondering if anybody knows if it's safe (if even possible) to use the pineapple juice 12800 while charging it in a UPS style fashion.

[100m point to point wifi]

My main concern is what the latency will be like.

[100m point to point wifi]

I'm actually wondering if that can in fact work at all.

Can you get 1 of those wireless antennas on the router to operate in client mode?

I have one already and it seems to work. Also I'd have one in client mode then hardwired to a desktop PC.

[100m point to point wifi]

So I'm contemplating connecting my grandparents home to my home network via a 100m point to point connection using 2 yagi antenna (https://hakshop.myshopify.com/products/16dbi-yagi-antenna) and 2 tp-link tl-wr841nd (http://www.ncix.com/detail/tp-link-tl-wr841nd-4-port-10-100-98-54972.htm) access points running openwrt. What I want to know if how well this will work and what kind of speed i should theoretically get. Also if you have any better hardware to use that is still low cost I'd greatly appreciate it. Thanks.