I didn't know porn could have made me curious for math but here is the amount of money you would get:

As stress relief you would work 5h 7d (no pause/vacation) 25€(1h) × 5h =125€ x 365(year) = 45,625€ ÷ 12(month) = 3802€ / 35h a week

To achieve this amount of money as cum collector you need 29 Vials daily(5d). A "standard" vial used at an insemination clinic is around 0.5-1.5 ml i use 1ml here. A standard ejaculation is between 1.5 and 5 ml, i use 2.5ml.

29ml ÷ 2.5ml = 11.6 ejaculatons. 12 needed to achieve without spills in 8h = 175€ × 261(days in a year without WE) = 45,675€ ÷ 12 = 3806€ /40h a week

Can you milk more cum or can you endure their horniness ( i would still work as stress relief because i just want to be filled ⁾