Thanks guys! ESA and DLA are classed as "proven" income with regards to my lender. £6500 is my deposit. Not all parts of the country have excessive asking prices!

I currently receive ESA, DLA and housing benefit for a long-standing disability. My savings have amounted to £6,500 (which i have declared) and thus my ESA is gradually going down by £1 a week for every £250 increment, hence i thought i would invest the money in a buy-to-let. How would this affect my benefits?? I imagine after all deductions from the rent, i would receive around £200 a month NET. The obvious goal is to become self-sufficient in a gradual move away from benefits over the long term. Advice is greatly appreciated, as the benefits helpline no longer exists. Thank you.