How much does it cost for build maglev train and 9.5miles rail?

If you are only trying to build the right-of-way and not buy real estate, or construct buildings or stations, or pay for control, communications, and power systems or the maglev train, it is not expensive. Today, the typical right-of-way cost for a low end system (for 9.5 miles it is expected to be low end), this would be under $20 million in the US.

To find the cost for the train, you have to decide how big it is and the systems to use, and the testing to be performed to allow you to operate it. And is it an existing approved train system, or is engineering required? And you will need spare equipment to operate during regulatory required maintenance. The train costs could run from $10 million to $100 million - there are too many unknowns.

The control systems can vary widely as well, but add in $10 million.

This fits in the US "typical cost" today of $10 million per mile for maglev (and that is the low end), as you should be able to get everything done for about $100 million. The good news is operating costs are very low and wear is low, so a return-on-investment is very fast compared to conventional railroad investment.