A few things to consider here.
First, do you qualify for a mortgage? If yes, why not et the most out of your capital and use a mortgage which today can be obtained for those who qualify at little interest almost like free money!
If it's an investment property, your return on investment and capitalization rates will be much higher when you finance!
Learn more about Las Vegas Real Estate Investments:
Also, you may come across many properties that are cash only, whether that's what the seller chooses or the property may not qualify for a mortgage (e.g., a property with excessive mold, or a condo complex not approved for financing by Freddie and Fannie.