No, I really built the second base right away (wll, on Jan 1st to avoid unnecessary upkeep).
2nd base on Sri Lanka was 500.000 + Hangar for 200.000 + General Stores for 150.000.
By the time the general stores had been finished I added Living quarters for 400.000 (a bit delayed to avoid upkeep in February). When that was finished a Van and a few soldiers + equipment.
Over the following two or three months I added Prison, Animal Pen, 2nd Hangar.
I was always low on money for quite some time, but I did not have to delay Int Labs/Bio Labs because of money. Maybe I was lucky.