Well I'm looking to start 10 gallon batches soon. As far as space and location not sure yet I'm about to move to California and I'm not sure on the space I'll have when I get there. Why do you ask?
Or you can use 12v or 24v food grade pumps which cost about $20 each with shipping plus another $5-10 for a power supply to power them...I use three of these permanently mounted/ plumbed in my system with camlocks to remove them for cleaning or inspection if needed.