do you have an old stryafoam ice chest?
put a heating pad in it on the bottom
I'd lie the eggs on top of something, not directly on that
so like towels or better yet
put towels on that and then lie the eggs across a pulp egg carton so they have some insulation.
put some warm web sponges in there (heat in microwave but be careful not to burn yourself, use tongs or something)
I'd but a bowl in there for the sponges and water that is higher than the eggs so the little one can't drown after they hatch.
Get the humidity up in the room by boiling water, running a hot shower, running a humidifier
you can also put the eggs on towels under a lamp to warm them (like a desk lamp or a brooder lamp if you have one of those)
but start boiling water to raise the room humidity
(you were wanting to peel off that wall paper in your kitchen anyway)
Good luck