I'm going to bring up my favorite gardening technique again. I'll warn you that it's not labor free, but it is a free resource that can work in many ways in the garden. Purchasing a comparable product to fill even some of the roles will quickly run into several hundred dollars. That's ramail
wood chips.
Choose a spot on your property which can be accessed by a big vehicle which you would be willing to store
organic matter in (or be able to do a whole lot of shoveling in a short span of time) Then, if you see an arborist with a chipper doing work anywhere near your home ask if they're looking for a dump site. Every few years the electrical company does mass trimming of all the
trees near power lines, this can be a good resource.
The catch is that they bring a full dump truck load at a time. This gives you an opportunity, if you know where future
garden beds will be, but you won't be planting them immediately. Bury the Bermuda grass under deep mulch. I'd use
cardboard as a weed block under it, but if you'd rather just pile the chips deeper, it'll still work. Yes, you'll still have to weed the Bermuda, but it'll come out of the wood chips even more easily than healthy soil. By the end of a year you'll have a weed free patch of ground just waiting for you to start planting.
It's also a great material for covering paths. I like to dig a swale and then fill it in, doesn't compact the way soil does and you can feel the difference when walking on it.
When I'm potting up plants I like to put a layer of wood chips in the bottom of the pot. These seem to be the only potted plants that don't die on me.
And then of course there's also the regular mulching you can do with it. Personally, after a year of being used above ground as mulch I don't worry about stirring it into my soil. If you worry about it, Craigslist can be good resource for finding manure to turn this into a more balanced compost. Either find someone offering it, or post a request for anyone looking to get rid of some. Took less than 24 hours for us to get two offers, one for horse manure, one for
chicken. Of course, this does involve more shoveling. I did warn you it took labor.