Below is a list of the unmodded upgrade costs and times. There's too many variances of mods to list all the combinations.
Costs
1. 210,500
2. 350,800
3. 584,700
4. 974,500
5. 1,624,200
6. 2,707,000
7. 4,511,700
8. 7,519,600
9. 12,532,600
10. 25,065,250
Times
1. 24
2. 27
3. 39
4. 47
5. 55
6. 63
7. 71
8. 79
9. 87
10. 95
Payouts
1. 2,101
2. 4,202
3. 7,354
4. 11,556
5. 16,808
6. 23,111
7. 30,464
8. 38,869
9. 48,323
10. 63,030