Thosha For what it's worth, I have a list of suggested investments just prior to the expedition to Philon. Feel free to adopt, amend or disregard. Naturally all subject to change based on subsequent events in Chapter 5.
Tertia Sacrifice 250 K;
Denlak Agriculture 1,000K;
Denlak Judges 1,500 K;
Rodak Trade 100K;
Invalans in Helvanna to Rodak 350K;
Helvanna succubus Lustlord priestesses to Orgasmic, 250K;
Rodak Orc Merchant in Tak'Kan 425K;
3Some Reform 250K;
Magical Defenses 1,000K;
Base Defenses 225K;
Orgasmic smuggling reduction 500 K;
Ulrissa Relocation, 500K;
Orc statues TakโKan 8K;
Ardford Ornaments 11.5K.
At the end you should have 34K remaining.
Things left undone:
Succubus Knights;
Imp Office;
Empire Gathering complex;
Rodak Gathering Village;
Throne of Lust reconstruction;
Orgasmic Magic defenses;