I agree with the above. Don't bother with the sim. If you want to play around with pretend B737s then you'd be far better off putting a bit of money into a PC based simulator at home. With all of the money you're saving by not doing a full sim endorsement, go and do some real flying, PPL, aerobatics, float plane, gliding, whatever, just get out there and enjoy it. Don't think of maintaining your PPL as a "chore" or an undesirable expense, think of it as an excuse to go flying and have fun!