For me I would buy 4 buckets and 4 grit guards...
-One bucket with 2 grit guards for wash.
-One bucket with 2 grit guards for rinse.
-One bucket for lower panels.
-One bucket for wheels.
For MF towels the Micro Pak ones are the highest quality. As other suggested, a high quality (2) wash mitts and a couple Waffle Weave Microfiber Drying towels will help get you started. After you start with this you will notice right away " Ahhh I need _____"
Let me know if you need any help.