I'd simply ask them if they want new, or fix up their current machines. Quite frankly, a cheapo Bay Trail machine is a side grade (if not a downgrade) performance-wise, in addition to lacking the SSD which can improve user experience greatly for these sorts of users. For the older folk, I'd prioritize user experience over greater battery life.
There's also Windows 8 to consider which can present a learning curve for them as well (unless you're willing to downgrade a new machine to Win 7).
Given these factors, I'd sleep well at night recommending fixing + upgrading the first laptop. Provided the laptop itself isn't falling apart, there should be no problems for the next year or so. Heck, you could probably part out the second machine to reduce costs for the above since a new LCD is expensive, not to mention the dead USB ports. Actually, if the cpu is a dual core i7, I might be interested myself.
