I need to get 3 scoreboard laptops online (reliably but with low bandwidth) in a disused (Smales) quarry but I'm on a (sports club) budget.  Their separation (120 m through trees) means I need 2 WiFi APs to get all three connected.  I expect it'll be easier to provide LTE connectivity at two unconnected APs.  There is no requirement for comms between the laptops (only laptop to cloud and laptop to court-side displays) so this seems efficient.

2DM is my preferred (existing) mobile vendor but I've spent a long time on their web site and visited 2 different physical stores and they don't seem to even understand what I'm trying to do, let alone offer anything like such a solution.  Am I missing something?

I am considering purchasing a pair of unlocked Huawei B310 B310s-518 4G LTE CPE WIFI router/modems with antennae at about $70 each on AliExpress, bunging in a couple of 2D sims and buying a $10 data pack for each whenever I want to use them.  Are there any compatibility gotchas that I'm likely to walk into?

For a slightly higher cost I could buy three unlocked Huawei E3372 E3372h-607 (plus a pair of antennae) 4G LTE USB modems at about $50 each and use my existing WiFi AP for on-site WiFi to the courtside displays.

I'm keen to get this network running for a competition at the end of the month so I've got to pull my finger out but I want to avoid buying the wrong stuff and having to start again with no time or money left.  This must be a fairly common thing to want to do so I expect there is a heap of experience that I can draw on here.

Thanks in advance.  Jef.