Curly hair weave

I have really curly, blonde/brown hair. I am of white origin. I'm pleased with my hair but i really want it longer! i was considering a hair weave as clip in extensions never ever come in my type of curls. but i don't know much about it so any help please!
-->how much would it cost on average?.
-->would there be a style for my hair type?
-->Im going away for a month in the summer to a really hot country...will it be okay with the sun and sea?
-->Will it look natural? or just straggly and fake, like i want a pretty close match to my type of curls- theyre quite tight.

thanksx