Snowflake charges $2 per credit in compute costs on their standard plan and $40/TB/month in storage. See https://www.snowflake.com/pricing/ for more details. Since the beginning of my trial, I have used 9 credits and 40GB of storage. So I have used about (9 * 2) + ((40 / 1000) * 40) = $19.60 worth of resources so far. This isn't terrible but I must caution you that Snowflake costs could balloon pretty fast. That's why I also set up a resource monitor on my account to stop all warehouses when the number of credits reaches 20. https://docs.snowflake.com/en/user-guide/resource-monitors.h...
I would recommend if you were going to go my route, to setup resource monitors, and only use XSMALL warehouses which consume 1 credit / hour. Snowflake sizes warehouses in t-shirt sizes, and the credits consumed doubles each size up. So XSMALL = 1 credit per hour, SMALL = 2, MEDIUM = 4, LARGE = 8, XLARGE = 16, 2XLARGE = 32, 3XLARGE = 64 and 4XLARGE = 128.