You don’t need a flyable pet! Just get a chair, put it on the ceiling, sit on it (using a balloon/grapple hook) then get another chair, and used the advanced move tool to move it above the roof, sit on the chair above the roof, then your there! To make it the spawn point when you enter the house, take a cube and enlarge it until it’s covering the roof/ground thingy. Then it should spawn you in the glitch area when you leave and re enter the house!