Cardiac and/or Vascular or general Ultrasound have the most openings right now. I did my training with the Army reserve and stayed an extra year on active duty to get more experience before I went back to my reserve unit. I got registered but not having a degree was really killing me. Big hospitals here in STL wouldn't even give me the time of day.
Here is what I had to do: So I was on unemployment (luckily) after getting out of the Army. I got a part time job working as a film runner for portables. It paid next to nothing, but I put on my happy face and made friends. I did this for 4 months until one of the immature, 21 year old techs got themselves fired for showing up late all the time. Too much partying... Good for me. So I applied and worked part time being a tech. Someone else left to go to Ultrasound school full time so I took their place.
Moral of the story-- getting in is the hard part. If you have to take a crap job working in laundry, dietary, or as a lowly film runner that some brain dead retard can do-- go for it. There will be a place for you sooner rather than later. That's my story. That's how I got here.... the hard way.