Looking for programmers expertise

Hello, i’d like to integrate a couple of minigames into my game. But my coding knowledge in programming is quite weak right now. So i need to find a guy, and make him/her an order. the thing is because of my low level in programming, i have not a single clue of the time needed for a minigame such tennis, fishing, handball or whatever. So i don’t know what price to ask. I’d like a versus AI non multiplayer stuff. So anyone can help me out getting an idea about the hours needed for such stuff, and the price (more or less) i should ask
Thank you