Boy this is the truth! I tried to break into the housing item market once and spent months frustrated as hell and lost a good 5-10 million gil in the process. I was happy to go right back to my food crafting after that lol! It may not sell for as much as furniture, but at least it's solid steady gil.
Also, don't forget OP that mat value is relative. It literally never would've occurred to me that undyed woolen cloth was even vaguely expensive and would make a bed worth more than the prices you listed. Same for gold, jadeite, and spruce lumber. The ebony would give me pause for the borax, but most of that I can collect via retainer over a couple of days without breaking a sweat.