I pay $65.00 per month for two classes a week. The only expense other than that is for wraps if you want them..I prefer MMA grapple gloves, and a cup for guys.
There is no addidional cost (at our dojo) for fight class except the cost of the gloves, headgear and shin guards...around $150 - $200
Seminars run from $150 - $200 plus travel expenses. I have found seminars to be worth the money, but that is just my opinion.
"Your results may vary"