Hey FSIL,
No my FI and I will not rent out a shithole of a house for you to keep your horse and dog at for free because it has 3 acres, and no we will not make "renovations" so you and your bf and son can move in a couples years after we have "fixed it up." Even though your bf makes more than your brother and I combined but the two of you still choose to live with your mother. Grow the Ef up and stop trying to take advantage of us. No, the world does not revolve around you, and no I will most definitely not be doing you any favors for now on!
....I feel much better....