on the rims

cost-effective efficient practical prudent

avaricious canny chary circumspect close closefisted curmudgeonly frugal meager mean methodical miserly money-saving parsimonious penny-pinching penny-wise penurious provident prudential saving scrimping skimping spare sparing stingy thrifty tight time-saving unwasteful watchful work-saving

inefficient

careless uncareful uneconomical unreasonable wasteful