Day 252 of the same game. Just sold an A- slave at auction for 4570 sparks. Had to take a small loan to cover costs at the end, so net is only 3970 sparks, barely more than the last auction. The slave wasn't prepared as well as I wanted (another decade or two and she could have reached A+ with enough specializations to have auction value of over 6000). I was not as careful as I could have been with expenses (those A+ meals add up fast) and got sidetracked by Isabella's faerie pollen addiction and other concerns ... such as acquiring a barn, training an egglayer, training a farmhand (who will eventually replace Isabella as primary assistant), training a sanity-warning Tough slave just enough to reach D- [mostly by ordering her to clean the house when it's grimy and she has no idea how, then whipping her for her failures, and then leaving her overnight in the dungeon with high guilt...] while sending her to the arena [two out of five battles so far] with the intention of making her an arena champion then trading her for the Bull Ring, growing a fiend up to Tentacle Beast, and reaching Strong, Imperious, Steward, Champion (with Aketon), B+ petting, C- other sex skills. Master still has not learned more fighting techniques but now has a Trident and an Epee and a Yatserin Mail. He has won only one Fogs battle (young fiend). Isabella has won a couple of races so far (not including "The Deathtrap") and just became an arena champion at the last battle. Barn is currently running at a slight deficit (around 10 sparks per decade) as food costs are "eating up" the profit margin. Decade bills are coming in at around 500 sparks, so I probably have 6-7 decades of training time for the next project. The A- slave took around 5 decades.
To make the barn a bit more profitable, I've updated the dev build with an automatic spawn semen diet for the egglayer if she has a fiend tattoo and there is enough supply. The Tentacle Beast has been keeping the fridge fully stocked. Perhaps it's time to get a cow as well...