It's being 6 months. If I build a second hideout + outpost + few farms + 15 peasants for defense will I be making money or losing?
Soldiers get more salary when promoted. Will Gals get a promotion because of all the peasants on second hideout or promotion is not shared between hideouts?
Promotions are shared, gals will get a promotion (usually units with more stats get better rank, and top of the line peasant is barely as good as a slightly experienced gal)
15 units may trigger promotions - 4 bosses, 80k total, 1 mistress - 50k. maybe you will get a threshold for a princess, 100k. That's a single brainer, nothing to worry about.
Second base may give you much more money than that.
1. Radar coverage - more interceptions and landing. Millions right there.
2. You can offload facilities from your main base, like prisons - you want to run at the start like 3-4 of them to preserve rare-ish captures.
3. You can speed up your research. Mess hall adds a brainer space. I build bases ASAP, and beeline to the mess hall. 8 bases (depends on difficulty, ofc) - half of your lab.
4. Bases make a lot of money. Plantations suck, runts is where it's at. Early game runt den with a still, 3 extractors, and a hangar makes ~1.5M a month on grog, and if you get apples, you get ~5m from chateau.
As an experienced player I usually do build a plantation base, but it's not the source of money from plantation, but as a material production, mostly sectoweed for money-making facilities, sometimes boom fruits.