Are there console commands to this mod? A friend and me are considering making a second force to have separate tech trees, and I was wondering wether there was a command to give the new force the same amount of money the first one had?

As far I remember, currently, none for the case.

But it could be changed, like I did with https://mods.factorio.com/mod/m-multiplayertrading

Then I'd like to suggest a command to add 5k gold, and one to remove 5k gold (to a minimum of 0 gold). I feel like 5k is a big enough number that it's bearable to just enter it multiple times, but also small enough that one could still pass it off as a small adjustment. (Also I guess if people were to make addon mods with new items, these commands might make it easier to test them.)

Maybe even a command to temporarily disable re-filling your inventory from Ultimate Miner/Enchanted Magazine? hope

In case you need to change your money urgently (should work in theory):

/c __m-rpg_items__ local force_data = storage.forces[game.player.force.name]
 force_data.money = force_data.money + 5000