Hello. I hope this project suits your family needs.
It is a very simple layout but it will help you separate your rooms without feeling in a small space.
It will also give you the advantage of having guests over and also keep to your family.
You will have to make some costume made furniture but it will accomodate the space perfectly and forever.
Im sure you can be under 20,000.00 to make this project work. (It depends on the materials and furniture you buy)
Im sorry about the pixels in the PNG files. I uploaded a DWG and two PDF file were you area going to be able yo read everything.