Learn Spanish (Latin America): ¿Aquí se alquila el espacio para estacionar?

The word se here creates an impersonal statement. We use it when we don't know exactly who is doing the renting, or when the specific person doesn't matter. It translates to 'is rented' or 'does one rent.' Without se, the sentence would mean 'Does he/she rent the space here?'

If I wanted to ask about multiple parking spaces, would se alquila stay the same?

No, the verb needs to match the thing being rented. Because el espacio is singular, we use the singular verb alquila. If you wanted to ask about multiple spaces, the verb becomes plural to match them: ¿Aquí se alquilan los espacios?

Why is the verb estacionar left in its infinitive form instead of being conjugated?

In Spanish, when an action comes directly after a preposition like para (for or in order to), the verb always stays in its full infinitive form. Even though we say 'for parking' in English, Spanish uses para estacionar (literally 'for to park').

I have learned the word aparcar for parking. Can I use that instead of estacionar?