SaaS HRM Application

I need two applications built. A. SaasS HRM solution build based on the open source version of Orange HRM [login to view URL] Basic requirements are: 1. Central company signup where company rep enters email address and selects URL address xxxxx.myapp.com. 2. Only one plan billed per user. So for example a company with 10 users will pay $1 per user = $10 monthly. 3. System automatically creates new tables in one same database with prefix of company id eg coy_1_. 4. User logs in and backend exists at [login to view URL] where tables are pulled based on value of xxxxx. Full details and requirements to be given in brief but the only major extras are verification and billing notifications via email. B. On top of this I need an API to allow for a second application built to model after Envoy visitor registration. [login to view URL] (can be web based) even though it will be accessed via tablet. Visitor registration application will be connected to staff database from HRM application above.