Hi there,
I am completely able to do this for you. All I would need is your login information to your domain hosting site and to your Tumblr blog, (feel free to change the passwords temporarily during this process). Your budget states $250-$750 and it would be silly of me to turn down extra money, however, what you're asking for can be done in a matter of hours and I don't feel ethical taking any more than your lowest bid.
If you're open to it, I would be willing to do this project for $150 in exchange for an honest review after the projects completion. Please let me know in your reply whether you would be open to doing so. I'm not one to put others down but anyone asking for over $250 is completely abusing your budget! Make it a great day.
-Gracie A. Morgan