Brenda: I guess the answer to your housing question is best answered by Fort Bliss. They maintain lists for those who await Housing and can tell you what the availability and wait-times are if any.
As far as living Off-Post, El Paso is a relatively inexpensive place to live. If you decide to rent or buy property, you can get a lot of house for your money there.
As far as distance to Fort Bliss from your potential home, whether On-Post or Off-Post, you can pretty much get from the furthest parts of El Paso to the Main Gate in less than 30 minutes in most cases. You have several freeways and loops that can take you anyplace rather quickly. Specifically, Interstate 10 East/West, US 54 (a.k.a. Patriot Freeway) that runs North/South and closest to at least 2 Fort Bliss Gates, and Loop 375 that runs from Northeast El Paso to East El Paso while passing several gates. It's much easier to navigate than I've tried to explain here.
As far as schools, I'm told the On-Post Schools are very good. You might ask around about those. Off-Post offers 3 school districts; El Paso Independent School District, Ysleta Independent School District, and Socorro Independent School District. Lots of private schools, charter schools, and religious schools can be found in El Paso too.
As far as your Accounting background, there may be some opportunities on or close to Fort Bliss. Several companies have their headquarters or regional offices in El Paso. You may wish to check out the El Paso Chamber of Commerce or one of the other 2 Chambers for more information on things outside the post.
Spouse assistance can be found on Fort Bliss as well.
My Friend Brianna Hartzell who serves as the PCS Community Manager for this Blog may have more to add.