When do you get pre-approved by USDA RD SingleDirectGuar. My score was up past 620 until I enrolled in a new school.

I also have the Housing Choice Voucher and my housing authority has in the admin plan that they participate. I was in one home for 9 years, a single mom with 3 children. 2 under 21 and one 24 co-applicant. My mortgage assistance is $1300 a month. No real estate person has a clue what to do. How do I proceed? There is no reason to not be accepted bc I did all that required. Any suggestions from Louisiana.