I have an astro myself and am wondering, do you recommend getting a 100gal tank? can I get by just fine with two 5gal buckets to detail a car? 3gal for the extractor maybe 4. and 2 gal for the no rinse and a nomad power washer with its 3.5gal capacity to hit really dirty spots, wells, engine bay and what not. I feel like its really not that necessary to carry a huge thing like that? I'm new so help me out here.