Is it hard for a father to obtain joint custody?

Depending on what county you are located in, it is NOT difficult for a father to get joint physical custody. Indeed, many of our courts prefer joint custody schedules (keeping in mind that 60/40 is the same as 50/50 in Nevada) and look for ways to make a shared custody schedule work. There are many factors involved, beyond those you have identified, so you really need to sit down with an attorney who practices in the jurisdiction your case would be in for at least a consultation to learn how the system works and what you can expect.