I'll add in that something you can do to get started right away that won't cost you a lot of time or money is to start a nursery plot for perennials that can be propagated by seed or division. This will probably actually save you a lot of money in the long run.
A lot of perennial seeds require a stratification period in order to germinate, so this year might be too late for some varieties. Some require no stratification period or only a short stratification period.
For example, in my limited experience apples only need a short stratification period before they start to sprout in the fridge. You can get hundreds of apple seeds that will be useful as root stock for a few bucks.
Sheffield's has a search tool that allows a person to search for plants that have no stratification requirement (just check the "Ready to Grow" box). There are also a lot of other handy search functions on their page so you could say search for drought tolerant perennial edibles that grow well in alkaline soil and need no stratification.
Sheffield's advanced search
This is something that you can do in addition to hiring a consultant to do a design and buying trees from a nursery. It won't be as helpful this year, but any large scale implementation is probably going to be established in chunks unless you're willing to spend a lot of money.