A 737 rating is worth a min of 15K pounds. Don't do one in the states or Oz expecting a short cut. Since it won't have been done under "JAR" it won't be recognised because you don't have 500 hours on it and relevant experience yadda yadda yadda....
Funnily enough, there are some (ie not many) jobs for 2000 hour piston drivers, esp if you have some twin time. It's usually for the likes of Loganair driving their Islander out of the Shetlands. Not a bad job. Pays better than many FO positions on smallish turbines.
This may sound harsh. I wouldn't bother coming over here unless you have some turbine time. By all means, plan to do the stuff part time if you really want to. I know a few guys from Oz/NZ who don't have any turbine time and they are either instructing or still flying pistons... if they are working at all.