A monthly mortgage payment of $600 or less (not included taxes, HOA, etcetera) can be accomplished by financing no more than $90,000 at 7% estimated interest; so, figure you put 30% down, that will be a sale price of up to $128,000.
Please keep in mind interests rate fluctuate as well as requirements for down payments, based on your qualifications. If you contact me direct I can guide you to a great loan officer, Megan Chandler, who is experienced, honest, and informative.
As of right this minute, there are 61 properties under 125,000 in 89106 and 80 in 89107, which will consider Conventional or FHA financing; according to the MLS.
Of course, there are quite a few properties in Las Vegas as a whole at that price range; based on what you are looking for, owner-occupied or investment, specific zip code (as you requested) or broad area, SFR or Condo, Size, mortgage versus average rent, garage or no garage, and more, I can help you find the property that is just right for you.
I can help with any of your Las Vegas Real Estate needs or questions; feel free to contact me direct.
Search the MLS Live at http://www.markfleysher.com
Mark Fleysher, MBA, Realtor