I've found Ancestry well worth the money. If you only need to research Scottish records, Ancestry.co.uk membership is less than half the cost of Ancestry.com and will be well worth the money for access to census records. Once you have some census information you can then go onto www.scotlandspeople.gov.uk which gives you access to searches and birth, death and marriage records on a pay per view basis. You can also access census records on Scotlandspeople on a pay per view basis but if you need to look at a lot of them Ancestry will work out cheaper.