About the unexpected errors when you're getting hashcodes: craft a whole pile of server upgrades (1 metal, 1 plastic, 1 electronics) to carry around with you when you're on hash runs. Look at the satellite server before you start the hash request; if there's less than 2 upgrades present then slap a couple in there and quit worrying about it. Getting hashes with 0 upgrades is borderline impossible, with 1 is doable, with 2 or 3 is easy peasy.
About the triangulation: dump all your points into beelining ping cooldown and speed; it doesn't get manageable until those are at least halfway to maxed out. I think sensor speed also influences how fast the radar cursors move, but it's kind of unclear. Aside from fire extinguishers and MREs, wastebaskets and rocks and empty flower pots and folding chairs are also good fast points now that item box space is no longer a factor. Your radar towers will start breaking down around day 5 or 6; learn where those are so you can run around and reset them after every bit of rain. Don't bother buying new fuses, they're a trap, you'd need to spend at least 200 points per day just to stay ahead of the weather.