Hello,
We would be able to help you with the website as well as the mobile apps. However, it would make more sense to focus on the website development for now as the mobile apps would be an offshoot of the main website. Both the apps and website would share the same database connected via a web service. Therefore, for all intents and purpose the website should be done first.
We do have the hand on experienced in building betting website and we are well familiar with the Algorithm and logic of the bets.
Now coming to your project description- First of all there has to be 2 bots for payment transaction and to carry on the entire game process by declaring win or lose . Second definitely there has to be login options. Third since trading is involved in the game there has to be a payment gateway integration. Fourth I would like to have a brief explanation on one of your point: If the coin flip has $10 or more in it's pot and has at least 4 items, I would like the bot to keep an item closest to 10% of the pot.
I would like to discuss a bit more about your concept towards the scope of your project. Even our detailed discussion will enable me to provide you the exact work time & appropriate cost required for your project.
Regards
Amit