minor spoliers to the saga.
with good financial planning hawker centre food sellers like a typical chicken rice uncle also drives bmws and benzes despite their 'low class' vocation!

so do not judge a bunta by his tofu shop!
supposed bunta saves, invest and spend wisely from young he would have build up a good safety nest of money to cushion takumi in case of bad times. bunta with all his wisdom would surely known that it is not advisable to spend all his earnings in car tuning and maintanance even though it is his passion and hobby. and regarding the AE101 TRD engine, bunta said that takumi also help pay for it since he had delivered tofu since young and the wages had been saved in his name (a glimpse of his financial foresight)and being both a good father (and mother), he gave the 86 to takumi in stages and only got a second hand wrx when takumi graduates and started working. finally to quote bunta himself when takumi offered his savings to bunta in compensation to the blown AE86.. (i am not that poor) from second stage.
