I definitely agree that better pictures of more of the house would help. I didn't notice a picture of the living room at all, or if there was one it wasn't easily identifiable. Some cute backsplash in the kitchen would help and is fairly easy. Also, looks like there was a space for a dishwasher, but you don't provide one. Do other rentals provide a DW? I would consider adding one. Decent ones can be had <$300 from scratch/dent.
I just heard some statistic the other day about something like 70% of people have ZERO savings or something like that. Don't quote me, but basically the fact is that you're going to be hard pressed to find someone that has nearly $1500 for a deposit PLUS the first month's rent to move in. I'd reduce the deposit to one month's rent and I'd consider working with someone on getting it paid in chunks rather than all at once if you continue to struggle, but that doesn't solve your problem of just getting people to respond, but it could be the next step.
Better pictures of the house and yard and maybe just a few upgrades might help. It's a super cute house.