You only need a license in Nevada if you plan to perform certain types of jobs that go beyond the scope of minor repairs. If your work will become a finished part of the structure (such as replacing flooring in an entire room) and the total for the project exceeds $1,000, you must have a general contractor license.
It's not unusual. If you are not comfortable tell them you are willing to do 50% upon delivery of materials, balance upon completion.
NRS 624.700 Engaging in business or submitting bid without license unlawful; prosecution; damages; bid submitted in violation of section void.
Are any services or items exempt from Sales Tax? Non-taxable items include unprepared food, farm machinery and equipment, newspapers, and finance charges on credit sales. Installation and repair/reconditioning services are not taxable if they are listed separately on the invoice.
The License Monetary Limit is the maximum contract amount that can be undertaken for one client on a single construction site.