If there's ANY personal or financial data involved, DO NOT use a cloud backup.
While tempting because of your personal circumstances at the moment, any breach of that service will put whatever in the hands of bad people. That said, CloudBacko states it uses military grade 256 bit encryption ("truly randomized").
I would only point out that frequently, buisnesses offer "unlimited" when in fact, it means "unlimited so that you put all your stuff here, but we have plans to change that in the future." A "bait and switch", if you get my drift.