Good morning Richard,
I was facing the same issues as you a few weeks ago, until I discovered JADAM Korean organic
gardening.
https://en.jadam.kr/ All information I have found has been free, and the methods described are quite easy. In this system, you can essentially brew your own fertilzers and microbes. You can also make your own organic pesticides, if you wish, but this is more difficult.
The idea behind making your own fertilizer is easy. I take a 5 gallon
bucket, put in a good handful of leaf mold gathered from local woods, and add yard trimming to fill the bucket, before filling up with
pond, rain, or well
water and sealing the bucket off. You can start using this after just 7 days! One 5 gallon bucket will make
enough liquid fertilizer for my 500 sq ft garden for several months. You can wet compost many other things too, like food scraps(including cooked and salted,)
urine, leftover or damaged crops(this is best to fertilize the same types of crops,) and even fish.
Brewing microbes is also easy. You take a handful of leaf mold and a half a boiled potato, blend it up, and put in a bucket of soft water. The microbes are ready to apply after a day or three, depending on outside temperature.
All the other advice given
should be more than enough to get all your mulching needs for cheap too, good luck!