New to the game. I need 700 SB as fast as possible!

I just made my account yesterday and I didn’t realize that buying new territory didn’t give subordinate male slots, so I got a male adolescent from the giving tree. Well, turns out he’s pretty but he left today because I don’t have room for him. I need 500 SB to get a male slot and 200 SB to get him back but I don’t know how to do that quickly. Yes, I have a week but I’m still kind of freaking out and I don’t know what to do?!

I don’t want free stuff, I just need advice! Any tips on getting all that SB fast will be HIGHLY appreciated!!!