I'm very sorry you have to go through all this
And the best advice I can give if you would like to continue with breeding, besides having pets, is breeding within an hobby budget without taking sales in consideration at all, and see sales really as a bonus to buy this new skin or clothes or something nice IRL.
Certainly during the summer season, every SL merchant feels this season in the pocket by having lesser income just because there are not so much people on the grid as during the winter season.
I think you will breed happier with just a few breeders you can afford and have created a RL hobby budget for than a lot which need to be able to pay for their food.
P.S. I just thought of something.
With gender on the box it is easier to put certain projects on hold, if you own both genders to continue, till you have the space again in your cattery to feed them.
And also it is really no crime to put kitties in your inventory I have thought the same for a very very long time and now I miss these kitties because I thought they were better off in menagerie.