Can I be admitted into graduate school in the US without undergrad degree (if I have master degree)
The simply fact of the matter is that you have to ask each program you are interested in directly. Some schools have a specific bachelor degree requirement, some don't. Like all bureaucracies the costs of bending this rule can be quite large. Being an international student might actually make it easier since the offices that deal with international students have to do a lot of personalized evaluations anyway.  What all schools do have is a contact address for exactly these kinds of questions usually it can be done by e-mail now. So my best advice is to ask directly the people who make these decisions and not the "internet." 

Once you learn whether or not there is a possibility of this plan working then you can worry about funding. The resident versus non-resident price difference only applies to public run universities but can be very significant. It does vary by which state the school is in does really matter. For example in North Carolina I know of a person who work for three years as a sheriff deputy (county-wide police officer) who was not granted in-state status at their universities.