I think your dream is perfect for you. You want to choose a multi-functional permaculture career path that will help you, it's my thinking.
For career choices. If you are looking at staying a city for your nursery business and other plans, then I would suggest putting city zoning with your landscape architecture degree. Depending on how far you are into your schooling and what the school is like, some schools do not offer landscape architecture before graduate school. Also, many of the classes for the two degrees overlap. The next thing to consider are the biology/ecology classes which would be electives. You can get the basics for ecology, horticulture, botany and such in your landscape classes, then mix in some sciences.
The city zoning or planning is based to give you a real use of permaculture knowledge. By the way wish you better luck for your dreaming career!
