I think my math is right but LMK if I’m off.
You want full care for 4 horses, which is valued at $1,200 per horse in your area (for easy math). You also want the trainer to pay you $250/stall for the remaining 12 stalls.
Let’s say trainer typically makes $300/horse off of full board after accounting for material and labor. Those remaining 12 stalls will bring in $3,600 per month.
The trainer isn’t going to profit off of your 4 stalls but won’t be paying a dry stall fee. However, he still have the base labor and materials cost ($650/horse). Since you are not paying him for those stalls, there is no $300 profit, only expenses. So each month your 4 stalls will cost him $2,600 out of pocket.
If you charge him $250/stall * 12 stalls he is paying $3,000/month + $2,600 for your 4 horses but only bringing in $3,600 after accounting for his expenses. Each month he is losing $2,000 on board.
Are you expecting full training at no cost as well? If that’s the case, the trainer loses another $4,000/month providing free full training to four horses or however much full training runs in addition to board.
Those 12 stalls seem to be split between full training show clients and a therapy program. That is going to be a whole lot of lessons going on if the trainer is going to come out ahead after starting the month $6,000 in the hole.
It actually seems like a detailed contract of full care and training for 4 horses in exchange for the property and other 12 stalls is a pretty fair bargain. Yes, your mortgage probably just went through the roof but the farm is building equity and your daughter’s horses get care and training at a flat rate.
When she goes off to school or moves, then you renegotiate for a flat rate for the full property.