A new bike, maybe?

I have been exploring the options of cutting down my costs. Not that I earn very little or I am overspending, I would just like to minimise my expenditure while maximising my body workouts. Hence, I have been playing wih the idea of cycling to my students' place.

However, there are restrictions, like travelling with bike between 9am and 4pm, 8pm and after and weekends whole day. The best part, all my students house are assessible by bike, especially the Seng Kang and Punggol students. I have even checked the routes on a daily basis, and they seem accessible to me. On an average, I may spend less than $50 on my transportation and be able to exercise 5days per week, with an average of 3-4hours of exercise daily. I may concuss on the first month with body aches all over, and I hope I am not over-confident about my love for cycling.

Therefore, in events like extreme fatigue, I would choose foldable mountain bikes over the 'traditional' ones for bus and train access. I marvel at the wonderful routes that google maps provided (using the walking option). Everywhere looked so accessible with the  thoughts of finally getting away from the clutches of bus and mrt schedules and out of the way routes.

With the 'turnover' to be around 20 months, I think it would be a good investment.

updated:
I have spent few days collecting info on the bikes. So far I have understood Montague, Brompton, Dahon, Bike Friday and Tern. I have kind of shortlisted two shops, Diginexx and My Bike Shop for test-riding and visitation. Hopefully by July I will have my bike and start my own exercise regime. I may not want to spend $1k on a bike. Hopefully I may get a bike below $500 with folding capabilities, light-weight, good travelling comfort on uneven ground and some rack to put some stuff (just in case I need it). No doubt I would love to really travel round Singapore alone just to have some exercise and exploration.

June will be the time I spend lot of money on iPhone. My 3GS is showing signs of aging. Sometimes I wonder if I have focused too much on life. I suppose it does not hurt that much trying to pay a litte to save more. Besides, I have decided to change my number (or maybe I should not until I have decided to stop teaching) and mobile plan so that I do not need to pay that much. $20/month×24months=$$480 for a 2year contract saving! Alright, I am being calculative. Good night, peeps.