What's the best way to clean vinyl records?

I'am getting into vinyl and have been reading about cleaning records with everything form soap and water,Wendix, expensive cleaners at $250, spin machines to machines that coast over $5000. I have about 300 to 400 records from the 70s they all need care. I'am looking for a safe way to clean records,not at a coast that doesn't make sense. What are your suggestions.