Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_18 (total INTEGER, fa_cup VARCHAR, club VARCHAR, league VARCHAR)

### Question ###
What is the average total of halifax town club, which has a league less than 30 and more than 3 FA cups?

### Accurate SQL ###

SELECT AVG(total) FROM table_name_18 WHERE club = "halifax town" AND league < 30 AND fa_cup > 3