This is the lowest I can go with all those things you want.
Let me tell you that there is no chance anyone will make you a custom theme for this low price. But, you still can get all those things you want if we can agree about the theme. I have a pretty big repository of WP themes (premium ones too) ;) So, if we find the right one for you, those little modifications like the slider are nothing special, but about those testimanials... I could make it, but it would take me a day ;)