Without a dedicated rug cleaning facility you'll never make any satisfying profit out of doing stuff like this - at least in terms of £ earned per hour spent. But you won't lose out financially and if you can become someone's hero, guess who's going back to do other work like carpets & upholstery?!
You need to think outside the box a little bit. The benefits are sometimes not immediately obvious.
I've yet to find a suitable workshop premises so I'm in the same boat really. At this very moment I have a very large rug downstairs in my lounge with four airmovers blasting it dry after I gave it the full works today, rugbadger & saturation clean. Kind of screws up my TV watching for the evening! But I'm always sat up here jabbering away on forums anyway so no real loss, only the dog giving me looks of "WTF?"
Once finished I've got a 45 mile round trip to return the rug, but when I picked it up I did a decently priced carpet clean at the same time. The house (stately home set in thousands of acres of land) is a grade 2 listed building with huge amounts of carpet, stacks of upholstery and PLENTY more rugs where that came from.
When I go back the van will be washed, best shirt on, freshly showered and shaved and salesmanship turned up to the max
Excuse my self indulgence
Just reinforcing the point that sometimes if you do something that means a lot to a customer it will lead on to a steady stream of repeat business ad infinitum
(plus it's a learning process which is invaluable)