I'm super shit at this probe thing and can't even get to 30000. Any help reaching for 70000? I'm thinking of getting the flight module first so I can scout for more sightseeing spots.
For storage or cash? For storage, just see above.
For cash: Duplicator probes with a Research probe next to them and a booster probe next to them will have the following effects: Duplicate probe gets the effect of the research probe and the boost probe, any surrounding probes to the Duplicate probe will get the effect of the booster probe. So a duplicate probe next to two booster probes and two research probes would result in the equivalent of four double boosted research probes, with two of those on the same spot.
There are a couple spots in the game where you can surround a duplicator probe with two booster probes and two research probes. Keep in mind that research probes boost cash flow for each found sightseeing spot around a probe, so place the duplicator probe on one with two found and try to place research probes on any surrounding probes with one sightseeing spot found. Toward the end of the game (after getting the flight module) I was making over 380K per tick. You don't really need mirinium until the post-game anyway, so it's best to use your duplicator and booster probes to up your cash flow until cash ceases to matter in the post game. Chaining research probes, unlike chaining booster or mining probes, is almost entirely useless because duplicator probes between research probes will make you more money.
The best locations to do this in are Oblivia and Cauldros, which both have ways to set up the scenario described above. Noctilum also works, but not quite as well so put any leftover money making probes here after the other two areas are done. Sylvalum is best used to keep your storage probes, Primordia for one big chain of mining nodes if you're having trouble keeping your Skells fueled for some reason. I'd recommend getting the level 5 mechanical skill as soon as possible so that you can take care of any remaining probe placement on your map. You can do this sooner than you might expect given the difficulty level posted on the board, the hardest thing in it is killing a kind of weak Tyrant that should fall easily to a level 50 Skell.