Please see below the walk through costs for upgrading and payouts.
Pretty decent building this time with any output bonuses at all should have a decent pay out. I also like the 12 hour cycle over 18 hour etc.
Finishing this gets you +1 Building upgrade!!!!!!!!!
Ground Unit - A:414,721 D: 254,183 (+1 Building Upgrade!!)
Costs below "should" be base costs with no building output bonuses.
Level Cost Output 1 100,000,000 750,000 2 167,000,000 1,500,000 3 280,000,000 2,625,000 4 467,600,000 4,125,000 5 780,891,667 6,000,000 6 1,304,090,000 8,250,000 7 2,177,830,000 10,875,000 8 3,636,975,000 13,875,000 9 6,073,750,000 17,250,000 10 12,147,498,333 22,500,000
Here's some great info from SSG I saw as well. It will really help you calculate your own info if you want to know your specifics.l