'cost expensive' is not correct and is not used in written English.
You would say 'costly' instead. For example: The expensive repairs cost a costly sum of money.
It is noted that experiments are time consuming and cost expensive.
THE COST Expensive enough to demonstrate you're not afraid of taking a risk.
An improper process model will be time consuming, error-prone and cost expensive, and further lower the quality of software.
Multistep chemical processes for the conversion of lovastatin to simvastatin are laborious, cost expensive and environmentally unfriendly.
Because direct measurements of rock compressibility are time consuming and cost expensive, indirect measurements from other readily available experimental data are highly demanded.
While the contract manager usually has a broad knowledge of the travel business in general, collecting and processing specific information about travel suppliers is usually a time and cost expensive task.
Problems with intergranular oxidation, energy efficiency and carbon footprint of the conventional endothermic atmosphere (CO H2 N2) carburizing are forcing heat treating and manufacturing companies to move toward increasingly capital- and operating-cost expensive, low-pressure/vacuum carburizing methods.
Pinched by soaring drug costs, expensive technologies and a growing pool of seniors, U.S. managed-care companies are being forced to tighten an already tight belt.
By-elections often have more candidates than there would be for the same constituency at a general election, which makes postage costs expensive.
But with capital markets tight, replication costs expensive and Baby Bells firmly in control of access lines to homes, competitors say they need to lease Bell lines.
So, the full characterization by experimental way is time-consuming and cost-expensive.
