Direct from VA here is the basic eligibilty requirements
Eligibility
You must have satisfactory credit, sufficient income, and a valid Certificate of Eligibility (COE) to be eligible for a VA-guaranteed home loan. The home must be for your own personal occupancy. The eligibility requirements to obtain a COE are listed below for Servicemembers and Veterans, spouses, and other eligible beneficiaries.
VA home loans can be used to:
- Buy a home, a condominium unit in a VA-approved project
- Build a home
- Simultaneously purchase and improve a home
- Improve a home by installing energy-related features or making energy efficient improvements
- Buy a manufactured home and/or lot
- To refinance an existing VA-guaranteed or direct loan for the purpose of a lower interest rate
- To refinance an existing mortgage loan or other indebtedness secured by a lien of record on a residence owned and occupied by the veteran as a home