cost-benefit analysis of buying a tricycle

[http://dummy.us.eu.org/robert (Robert)]

Anything else?

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Benefits:
 * May not have to get another back surgery, saving up to $70,000.
 * Can go faster because of less wind resistance.
 * Noelle may want to ride it sometimes
 * You're helping that guy buy another trike

Costs:
 * Change bicycling schedule since cannot take on light rail when going to Aikido.
 * Find place to lock tricycle at work.
 * Find a way to mount a bright headlamp.
 * Buy cable to securely lock in garage.
 * May not fit into Prius (at this this model of tricycle).