We're bursting at the seams

Generally, I keep a few mid-talent or over-the-hill horses on board to serve as a safety valve in the event that I need to make room quickly.

Right now, I am in the uncomfortable position of not having that luxury.  There are a couple acquisitions I would like to make but I'm tapped out stall-wise and I don't want to get rid of any of the horses I currently own.  It's quite a quandary.

These are my horses.... and the reasons I don't want to get rid of them:

1. Methy Bus - joining stallion ranks
2. Acquarella - steady producer who spun a WR in his last race
3. Battlestar - proven winner
4. French Twist - consistent money maker with very long career potential
5. Hollands Best - really quite talented for a no-name
6. Zombieslayer - long career should pay dividends
7. Jackhammer - proven winner
8. Le Chiffre - proven winner
9. Na'vi - has tools and it's too soon to give up
10. Ugotthelook - superior talent with broodmare potential
11. Viperwolf - should be dominant at G2/G3 
12. Give Me Danger - unraced 3yo with stayer heart and breeding
13. Helikaon - Kentucky Derby bound talent
14. Infinity World - rising PSR's bode well
15. Kid Shelleen - he's fast and strong so he should break out in 2019
16. Lapsus - acquired in On The Prowl deal... he's the next Methy Bus
17. Makes Me Wonder - expecting much more as a 3yo based on numbers
18. Reminiscing - nice start as 2yo
19. Rico Suave - Otsego's next distance stud.  Watch him.
20. Scarlet Witch - her numbers are good, early season will make or break
21. Simply Charming - three wins as a 2yo, hard to argue with that
22. Then Came You - long peak, rising PSR's... outlook good

Of course, I have 12 incoming 2yo's as well as another 28 yearlings and foals, none of which I will sell until I've seen them race a couple times and have had a chance to digest their numbers.

So...I need to make a little room, but I'm not currently in the position to do so.  What to do?