Learn Finnish: Haluan hemmotella itseäni, mutta minulla ei ole varaa maksaa hierontaa. - I want to pamper myself, but I cannot afford to pay for a massage.

This uses the possessive resource structure. Instead of a specific verb for "afford", Finnish uses the possessor in the adessive case (minulla), the verb olla (here, negative ei ole), and a resource noun in the partitive case. The noun here is varaa (from vara, meaning funds, means, or reserve). You then follow it directly with a first infinitive, like maksaa, to state the action you lack the means to do.

Why is hierontaa in the partitive case here instead of the accusative?

Because the main clause is negative (minulla ei ole). Even though hierontaa is the object of the infinitive verb maksaa (to pay), the overarching negative verb in the sentence forces the object of the entire phrase to be in the partitive case.

Could I express "I cannot afford a massage" without using the verb maksaa?

Yes! If you want to drop the verb and just say you can't afford a specific thing, you put the thing you are buying in the illative case. You would say Minulla ei ole varaa hierontaan. In our example sentence, we chose to use an infinitive verb (maksaa) instead.

Why is the reflexive pronoun itseäni in the partitive case?