grind, grind aand grind... oh wait, you can give us quite too much money to actually enjoy this game! like a bad mobile game, exploiting the Bloons fame.
i agree with the suggestion to put more time in one hobby. i have bought all gifts and went on all dates the girls wanted and now have to wait like assumingly several days before the hobbys will be lvl up high enough to attend the jobs they want or reach their requests.
otherwise it's a great and cute game =3
There are two places in which you can refill it... just look around you, maybe using the binoculars :D