I agree with
@Wes. I studied architectural drafting and yes, having knowledge of that is necessary to be able to properly design a property. Doing all the necessary paperwork, cost analysis, drawing/drafting and research requires time indoors - away from plants.
It's always been my opinion that a person must work at something for at least 40 hours a week to earn the money to do what you truly love to do.You need a
vocation which can support your
avocation and one which allows you the free time to pursue what you love doing. It is a rare thing indeed when a person finds a career which is completely fulfilling. You may want to find a career at which you earn enough money to fund your hobby (plants) and later expand the hobby into a small business.