Can I use section 8 towards a mortgage?

The house belongs to my parents. I have been living in it for at least 8 years and have been paying rent. The rent I pay is well below market value of rent in this area. They plan to retire in the near future and want to get the house out of their name. I could possibly get a mortgage to buy it, but I know my housing coat will increase significantly, and I can't afford it right now. If I were to apy for section 8, can I use it towards a mortgage, at least until I can finish school and get a better job? Or would I have to use it towards a rental?

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