I have a few tools I am currently using and would like it all integrated into one place, would need someone extremely fluent in coding.
Ok firstly, I am using [login to view URL] as a scheduler and would like if someone can custom build me a product just like this built into my own site. I have multiple teams I allocate jobs to and multiple clients who can see the projects that are theirs, you can signup free and see how it works.
The second main tool we use is eforms for wordpress. The functionality we use in this is emailing the contractors a link including URL parameters that prefill the job details and they sign the form, click submit and it emails us a copy in PDF format of the form. I am happy to use eform but if you can make it even better I am happy to pay.
We are hoping to roll this system out to sell to other companies and would like to charge per submission of each form, I found mycred for wordpress does mostly what we need, once again if you can build a better system from scratch that is fine.
Our current site is built on wordpress but I am happy to go whatever way works best.