Even a google search shows that the non slip material is an accessory and purchase and added onto a bath tub but they do not come from manufacturer with it.  

It's no secret that one of the biggest obstacles to building Accessory Dwelling Units can be financing.

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I also placed a second Internet order for accessories, also in stock.

Typically, what you are calling a "workshop / liveable space" is known as an accessory unit.

I have already built a smaller accessory unit on the property.  

Instead of saying why things won't work for you, try to brainstorm ways you could make them work, even if it's just an intellectual exercise.If renting rooms isn't a good fit since you're a family man, how about buying a single family home with an accessory dwelling?

It's considered an accessory use to your primary residence, but when you move out -- again, technically, you're only allowed to rent the whole space to one party.)

Here is the Urban Growth Area Map.http://www.co.thurston.wa.us/planning/comp-plan/docs/M-14%20ugas%20for%20land%20use%20chapter%20gina.pdf Here is a quote from the Thurston Co. website:http://www.co.thurston.wa.us/permitting/faq/faq-aboutproperty.htm  Can I build an accessory dwelling unit or an accessory living quarters on my property?

There is an accessory dwelling unit, which I intend to rent out.