There is more than one way to correct the sentence. For example, we could make the key words in the coordinate ideas all nouns.
Penelope's goals were a successful career, a good salary, and a marriage based on love.
Another way to correct the problem with parallelism is to make all the key terms infinitive phrases.
Penelope's goals were to have a successful career, to make a lot of money, and to marry the man she loved.
2. His work was a mess, all mixed up, and it wasn't well planned. (The coordinate ideas in this sentence are expressed as a noun, an adjective, and a clause. We're going to make them all adjectives.)
His work was messy, confused, and poorly planned.
3. When he left his home town, he was lonely, a recluse, and nobody liked him. (The coordinate ideas in this sentence are in the form of an adjective, a noun, and a clause. We're going to make them all adjectives.)
When he left his home town, he was lonely, reclusive, and unliked.