727 vs 737
BBear
I'm guessing this is for a check ride / interview?
Yes, the best plan would be to do a few hours on the same sim you'll be tested on, ie 737-300, but, like you said, it's pricey. You can get the same hours cheaper or more hours for your money on something like a 727. It's not the same, but if you can do instruments on a 727 (dials and steam) then that should be a pretty good leg up for flying raw data, no autothrust/pilot, no FD on anything else?
Plus they are in the same Boeing family, so there's lots of similar things, like thrust levers, trimming etc.
Just a thought, matey!
Good luck with your endeavours.
1DL