He's "actively" working on the stove to get it running so we can rent it. However, FIL has said he'd take over that project. H has had that stove for 3 months and it's still taken apart in the middle of the floor. I could have paid a plumber part of the $2700 in rent we've lost and had enough to fly to Disney for a few days.
Tell him his FIL is going to fix it and you don't need his involvement in that project anymore.
IF that's the only reason he needs to go, just tell him that you don't NEED him to GO and that's that.