Another option may be to try for a tech position elsewhere in the hospital you want and try to pick up shifts in the ER. I work pool for peds hem-onc. That means i pick my hours/shifts as long as I do a minimum of hours, not sure what it is, but it's really low and it's never a problem for me.
Two drawbacks to pool: no benefits (as in insurance, pto, tution reimbursement) and pool workers are the first to get sent home if not needed. I've been a tech since August and I think I went home early one time, but I was happy cause it was my choice on that day).
When Hem-Onc is slow/well-staffed I pick up random shifts around the hospital. Some hospitals may not allow this, but my hospital loves it! I started off with the Surgical unit (post op kids, as in the "surg" in med surg . Then I wanted to try something new and started picking up in ED. I love it! Since Christmas I've mostly worked there (way more hours than my "home unit" cause they really need techs.) There are a couple of things I can't do that theirs can (draw blood, splint bones, 12 lead EKGs) because they are specially trained but they still love having me there.
I had my RN interview with this ER about a month ago and landed my first post-nursing school job. I graduate in june and will start later this summer. (after boards).
Feel free to PM me if you have any questions or we can respond back and forth on the board so others can learn, too!