The farm I volunteer at uses nothing but compost to amend their soil. They don't even use irrigation, and we harvested watermelons, and about 50 other different things last year... Their vegetables are by far the best at the market, and are served in some of the finest restaurants in the country...
With that many houseplants, you should be able to make a compost pile from the extra growth and your kitchen scraps right inside. Buy as much stuff that needs peeling as you can, including nuts... My house is half the size of your workshop (seriously).. Start a bokashi bucket so you can recycle your meat and dairy into humus as well... Consider a few aloes, and some biomass generators like comfrey as houseplants... Nettle will condition the soil it is grown in... Worms would be a bonus...
Seriously, don't over complicate things. You have all the tools you need right here.
With that many houseplants, you should be able to make a compost pile from the extra growth and your kitchen scraps right inside. Buy as much stuff that needs peeling as you can, including nuts... My house is half the size of your workshop (seriously).. Start a bokashi bucket so you can recycle your meat and dairy into humus as well... Consider a few aloes, and some biomass generators like comfrey as houseplants... Nettle will condition the soil it is grown in... Worms would be a bonus...
Seriously, don't over complicate things. You have all the tools you need right here.