I have for sale a 500 gallon compost tea brewer and a 500 gallon sprayer on skids. Here are the details...
Brewer is enclosed in metal cage with ladder and platforms for working. It has three diffusers attached to two compressors that blow lots of air. Its vane type compressors are built for continuous commercial use, so only one is necessary for brewing. The running compressor is attached to two of the diffusers. The other compressor needs a capacitor ($14 on Amazon) and will need to be rebuilt if you want to use it. Again, it's not necessary so I haven't had it fixed. I am selling it as is and have priced these units taking this into consideration.
Sprayer is a custom-built skid sprayer that is totally self-contained. We used it on the back of a pickup truck. It has a controller (not pictured) that can mount on the pickup dash, with which you can determine which nozzle sprays and the pressure used. The pump is run by a honda engine that has no problems other than it's missing the on/off switch. I will replace that before purchase. The spray itself comes out of two boomless nozzles that give you a sprayed swath of approximately 35 feet per pass.
I have included multiple pics of everything. I have a video of the brewer running. If you have any questions, give me a ring or write. Nine0onefour91zero1eightthree.
Thanks for looking!
Diego Footer on Permaculture Based Homesteads - from the Eat Your Dirt Summit