My two cents worth about an inexpensive substitute for a hot glue pot.
Both warmers are available readily at a local thrift shop and both
work well.

1. A baby bottle warmer.  Put a little water in it and put your glue
in a glass jar that fits.  Voila!  It's temperature controlled and
quick and warms the right amount of glue.

2. An electric fondue pot.

I don't want to offend anyone but forget the crock pot.  It takes at
least an hour to bring it to temperature and I don't have the patience
to wait that long when I have a small job to do.  

Good luck!

Eli Shahar
St. Petersburg, Florida