Uh oh !, face it, if you want one sp your going to have to get them all, none of them sound the same, 202 is basically a sound destruction unit. If I was to go it again, I'd get a 555, a 404sx then 303, there is the zoom sampletrak as well, another dirty little, box.
If you need to pull the swerve ball on mum and dad, show them it's an investment, you got your future worked out !, show them the increase of price second hand they'll give you props especially the 303, offer to work it off in the house for them, wash the car, hoover, get them off balance and hopefully they will sway, if you want to make beats bad enough, something will turn up.
Have you thought of getting your beat off of the sp, mixing them, or sampling to the sp, some are easier than others with memory cards. Some more food for thought, you don't want to end up in situation where your stuck before you start.
My workflow personally is speed and kind of laziness. I'll sample through the sampletrak, sp 1200, and akai s950, and build folders of kicks snares loops etc, then when I open maschine, all of it is there, and I still have that sound, the advantage is I can layer sp 1200 samples with 950 samples. You got to think long term and easy, you can end up wasting money on something that might not be how you like to work creatively.