sell the van seperate, take off the signage. Is the van in good condtion? if so, keep it! Why sell to buy another!?
Sell the df on here or ebay and sell it seperate from the van. Is the DF system in good condtion? did you buy it new? I think you can get a good price for this.
Why change the name? Have you had many complaints?
If I where you i'd take a breather away from carpet cleaning for a month. If you can afford it. (maybe get a temp job??) Sell the df system in the meantime.
Get 20,000 flyers made. (search on here for tips on high converting leaflets). Search online every night (spend least time as possible on here) for businesses that need carpet cleaners, copy down the emails, telephone number and addresses of these people. Get a new website made, get rid of the cheap prices on it. Buy a hwe machine, doesn't have to be fancy. Get a 2nd hand steamPro or something. Just make sure its in full working order etc.
Then spend your days door knocking and leaflet dropping. Do this as a job, from 9 till 5. When your not dropping leaflets you should be door knocking and when your not doing those two you should be sending out letters.
With ever customer you get, put thier details on database and market to them few times a year. Give each new customer 3 or more business cards, leave them overshoes etc etc
starting from scratch again is a pain, getting a new van, new signage, new website, new trading name etc
You just need a new way of thinking and hot water extraction machine!
Take action now. Action is power. You could spend the next 2 years asking questions on here, you'll only learn by doing.