I am a mechanical engineer with experience in design of piping system (plumbing, gas lines, oil), that is way i offer you my services to perform this jobs, i use a flow simulation software for select the piping size saving time during the project execution, i can prepare the isometric drawings showing the material list and equipment specification, i am willing to send you samples of my previous jobs in this field that way you will be able to evaluate my work before take any decision for now we can set a price for mechanical and plumbing and after all that get approved we can discuss the electrical part, if you send me a message we will discuss in detail your project, best regards!