Hi,
We are well known to working of multiplayer games. We are able to deliver you the complete game in 20 days. The minimum budget and time is mentioned in the bid. The project is very complex and needs atleast 10 days for testing purpose only. so, maximum the limit for this can extend to 30 days.
We will deliver you the game in flash, while using PHP for databases.
All graphics are hope to get from your side. Consider us, we will give you the quality work in time.