1. we are flexible to use Java, php, WordPress. but our preference will be php or WordPress.
2. it may cost 0.1 INR per SMS
we have good knowledge in below mentioned skills by you. I also have some certifications in php. I can share some of demos with you if you want for better understanding. Currently I'm working on a banking project in an IT company using php, .NET, software architecture and database programming. And most importantly, you will get your project done before the deadline.