is my sentence corect?

It sounds strange, I think a better question is, is it natural and I can answer this definitively. No.

It's a bit formal so I'll give you a few examples of alternate sentences, and I'll make note of whether it would be considered formal or informal.

A few better sentences would be the following.

       1)    The restaurant that is affordable and bountiful and beneficent.

        2)    A restaurant that is affordable and bountiful and beneficent.

        3)    The restaurant that is cheap and tasty.

        4)    A restaurant that is cheap and tasty.

I would lather to take a rest at home than to go out today.
今日は出かけるよりも家でゆっくりしたい。

I would rather take a rest at home today.

I would prefer to rest inside today.

I want to chill inside today.

I don't want to bother with going outside today.

I went to beach to surffing, but waves were not good what's more beach was dirty because of heavy rain.
サーフィンをしに海にいったが、波は良くなかったし、海は大雨のせいで汚かった。

I went to the beach to surf but the waves weren't good furthermore the beach was dirty and it rained heavily.

At the beach today I surfed but the waves weren't good, the beach was dirty and what's more it rained heavily.

is my sentence correct?

Could this be "I like a restaurant which has a lot of food at a low cost"?

そのレストランは安くて美味しものがたくさんたのしめる。

I would rather to take a rest at home than to go out today.
今日は出かけるよりも家でゆっくりしたい。

I went to the beach to surf, but the waves were not good. What's more the beach was dirty because of a heavy rain.
サーフィンをしに海にいったが、波は良くなかったし、海は大雨のせいで汚かった。

is my sentence corect?