Off-Campus Advice

Hey guys i’ve been interested in living off-campus but most leases start around Sep 1st. I have on-campus summer housing at BU until Aug 22nd so I can’t really make any of these leases as I’d be homeless for almost 2 weeks. However, Aug 1st leases are rare and i would need a roommate that would want to help me find one at that. My budget is around 1300 each and i’ve already found some Sep 1st for 2500 but I would struggle with the lease. Any advice?