If you have a gas stove , you can place the seeds between two saucers and towel (wet) on top of stove . and the heat from the pilot light will be warm enough. i just did it in a Dominoes (the game not the pizza) tin can its in the mid 40's right now and the heating pad has a auto shut off.
they poped in about 18 hrs , and the second set poped in 24 hrs. 68-72 degrees , total dark , as soon as the popped put in rockwool
Im no expert , got the idea right here in the Forums!
tried it and it worked.
Now that i think about it the top of a water heater would be great just have to make sure they stay moist.