ORIGINAL: torrenal
Not a lot I can suggest to find missing funds, I usually don't have problems with them after the first set of colonies start taking off.
I'm still in early game in my newest attempt; i have all the races in play (i'm human)... But it's quite hard because all independents have been nabbed early and now finding new potential colonies often involve conquest... Well, not so bad, i do have empire i could not stand and started to snatch off it's worlds.
I've been playing at getting a dictatorship to work, and having some revenue problems myself.
I tend to prefer republic, but the extra maintenance tend to hurt.
Some suggestions, from my experiences:
Build a resort early -- I've got 2 up in my early game... 4k to maintain the pair, but they are turning a 16k profit (and that's weak for a resort).
I seen some people claim resorts are great at getting extra revenu, but i have yet to see mine start paying off. I know where to build them, but seem i'm missing something to make them worthwhile.
Look for (and nab) large independnt colonies (1+bil preferred).
Nah, that part i understood. I know what to colonize first... Must be some left though, my current game has too many competitors, i guess i will have to annex some of them before someone else does.
Get a port near another empire (one without those pesky trade sanctions): This is a great revenue earner, as foreign ships will stop by your ports for goods. While your merchants will love this, you get to skim some of the earnings as well (read: In addition to taxing the trade directgly, you get compound rewards over time -- Your merchants get fat -> build bigger merchant fleets -> more revenue to tax internally).
I tend to build at least a small port at my colonies, that way they grow faster from trade and allow more ships to dock, only build larger ones at well developped colonies or where lots of tradeships show up (most likely the closest colony to a trading empire).
I'd stalled my construction ship (set to manual and left idle) to keep him from spending money I was pouring into colony ships. This move I will admit is questionable.
I guess that must be it, i did queue up construction, as well as letting the ships run on their own. I guess i should turn them off. Strangely, the revenue can be in negative and i still get money in, or the opposite. Too bad there is no log for when civilians buy ships...
Until you have revenue in surplus, don't build many ports, and keep your navy to a minimum. Check upkeep costs of vessels you find, if they are cheaper than your own, retire your own ships and use what you find... until you can afford to salvage for tech.
I know that... Though i tend to retire all ships i find by default, i want the extra techs. I prefer to have my own designs as ships, they tend to perform better than what i find. I also learned to generally refuse requests to build more ships, otherwise i end up with too many of them that just drain away my income. Construction ships are the worst offenders, they cost more in upkeep than to build.