YOU SAID:

it took me half an hour to get here by bus

INTO JAPANESE

私はバスでここに来るに 30 分をかかった

BACK INTO ENGLISH

Took 30 minutes to come here by bus

INTO JAPANESE

ここに来るバスで 30 分かかった

BACK INTO ENGLISH

It took 30 minutes on the bus to come here

INTO JAPANESE

ここに来るバスに 30 分かかった

BACK INTO ENGLISH

It took 30 minutes on the bus to come here