I use an Ipad mini running pocket cloud to access Cleaners Mate on my home computer. Works fine. If you work in areas with a poor signal though you may have problems accessing the DB, but then most CRM apps are cloud based anyway.
Having said that I honestly think having a dedicate, cheap netbook is all you need combined with CM. I just got a netbook off ebay for £82 loaded with Windows 7 and Office, crazy cheap.