This mod reduces the cost of adding new pet slots to 50 nanites.
The original costs ranged from 500 to 20,000 nanites, which I considered a bit much, as adding pet slots has no real impact on gameplay.
Unlocking all 18 slots (the first two are free) normally costs 500+1,000+5,000+10,000+20,000×12 = 256,500 nanites!
With this mod you can unlock all slots for 50×16 = 800 nanites.
I wrote this as a lua script and built the pak using AMUMSS.
The changes are applied to METADATA\REALITY\TABLES\COSTTABLE.MBIN
If you want to use this with another mod that touches the same file, then use the included lua script to merge the changes using AMUMSS.
Credits:
Cubittus