Mobile App for IOS, Android and Wearables

I need someone who can produce an App for my new business.
It's a sport tipping App.
We would require a messenger on there to broadcast the tips to members within a seperate VIP member section (this would need a password to enter) and within that we could put horse tips into the horse tip section. Football tips into the football tip section etc.. Approx 12 sections. A free tip section. And a join us page with subscription via paypal (we have links). Also a messenger page for members to contact us quickly if they need help.
We would need to be able to upload photos or videos to the VIP area via our mobile phone on the go and it instantly sends a push message letting our members know of a new tip in that category eg: New Horse Tip.
It's a basic app I know but it should be everything we need. I have an idea on the home page layout with it being a football split into the 6 sections or so to take the user into the section of choice.
We have £750 left to spend in the business and I'm not sure what price we can get this down for, but this is maximum budget