I'm a home DIYer and not a pro, so this is all from personal experience without knowledge beyond that. So take it for what it is worth.
I have set up 5 of these so far for myself and family / friends the past 3 years or so. One has died, but we think from lighting strike / power issue?
I still have 3 of these in use personally. These can be used as an AP with the signal projecting from only one of these as the source and as a listener. One to a metal sided pole barn building about 50 feet from the device that projects through a bathroom window towards the metal sided pole barn building. I get about 20 mb/s from it on average to latest cell phones inside the building - so 50 to 80 feet away from the single loco m2 2.4g out of the bathroom window.
Look up "Ubiquiti NanoStation locoM2 2.4 ghz" . Though I think they are still available though they are likely end of life and not getting software updates and going up in price! I don't know, though I would hope there are still wifi compatible antennas still out there being made? These can be used in "AP" mode though only up to 54 mbs. They only have a 100mbs Ethernet connection and come with a power over eith adaptor (all of mine have anyways), so they need power also.
There are instructions on-line to set them up as an "AP" with a little work. They work great!
I have two other's used in "AP" mode (only 1 antenna pointed to a location - not used in repeater mode) and have got signal to a cell phone up to 450 feet away (end of block). Any tree or building interference reduces signal and bandwidth.
Even at 100' I would try it depending on the metal on the side of the building and overall building size and on your bandwidth needs. My typical medal sided garage at 50' with the antenna inside and through a window for up to 20 mbs works great! I can stream tunes and do wifi calling, ect. without a problem. Not sure I would want to have to stream video or "work" on it, but for home stuff it has never failed.
I use another to project a wifi signal from a garage into a large field for longer distances and it works great also.
Best of luck!
If you are going to dig somewhere to add a line, I would install at least 1" conduit and run lines through it. Best to only dig once... Digging sucks