Hello, Sir
I have reviewed your requirements carefully and I am always here to help you.
I have been exploring this field during 7 years and now I have a nice team of developers working with me who are experts in different technologies/fields like PHP, HTML5, MySQL, Laravel, Angular js, React js,, Vue js, Node js, Python, Flutter and Blockchain.
The final cost and timeline will be given after the complete analysis of requirements with your mind.
Thanks.
Stefan.