DIY Carpet and couch steam cleaning

Which one do you recommend?

• Britax
• Rug Doctor

Why? Which is cheaper? Which is easier to use for carpets and upholstery?

I have a massively filthy acrylic Berber (easily stains) carpet and some green old couches that need a good clean. I have some spare money and have worked out its cheaper to do it myself rather then $100 for 3 room and $100 for 3 couch seats when I have 5 couch seats and 5 rooms.

I have read about using white vinegar as a rinse or something anyone have more details on this. Thank you.

They are both owned by the same company (I used to work for them), the britex is easier to use & you can hire an upholstery brush with it. You can use white vingear instead of the defoamer but the defoamer works better & the bottles of chemicals dont go off. So when you buy them you can keep the leftovers to use again the next time they need doing
HTH