raspberry pi

I need a Raspberry Pi module with a GSM module on with a web server. Module will control GSM controlled gate/doors (call to number is opening a gate/doors) which has register only with one mobile number, but we have a lot of other guest coming so we would like to create server which will have a sim card with number registered on gate/door and our guest will get a link (time-limited) which they could click on so gate or doors1 or doors2 will open. The device should have password protected web interface. 1) Staff will log-in with username/password (admin could create more users, user can change own password, admin will have option to add mobile number linked to gate/door1/door2) 2) Staff/admin will be able to add guest with fields [name] [booking-number] [from-date/time to-date/time when user is activated/able to open gate] 3) Web page will generate a unique link [login to view URL][doors1/doors2] 4) Staff will see list of created guest where they could remove user or edit user to change to-date/time 5) List of guest should look like this: No. | Guest name | Booking-number | from-date/time to-date/time | Staff name who create guest | Edit button to edit guest all details | Suspend button to disable guest access | Delete button to delete guest from system | History of clicks on guest link | Copy of generated link [Gate|door1|door2] 6) We will copy-paste / send links to guest by our message system, if guest want to open a gate/door1/door2 should click on particular link - server will check if link is valid and will make a call to registered number to open a gate/door1/door2 7) History of guests and history of guests clicks should be kept by 90 days. Please provide me ready to install image of sd card to plug and run for raspberry pi. If system will work nicely there is a chance to improve this system later and have a more work. Any questions please do not hesitate to ask. Due to bad experience DEFINITELY I WON'T ACCEPT OFFERS FROM INDIAN/PAKISTAN/BANGLADESH freelancers. PLEASE DO NOT ASK!