Welcome Sheila! :)
Sorry to hear about your husbands stroke, heres hoping things will improve with rehabilitation. The simplest solution would be a super-automatic where you just push a button, but it can be tricky getting consistently good results from these machines. Presuming you dont want to go down that path, I reckon I could make a latte with one hand on a manual machine if I had to - the workaround points would be:
1: holding the portafilter level while you tamp - recommend something like the Bumper stand (I think Di Bartoli have these, otherwise Coffeeparts have some stands)
2: locking the portafilter onto the Classic - being a light machine youd probably need to hold the machine in place (solution: a more expensive, heavier machine such as those in the $1500+ bracket that wont slip and slide)
3: Starting to steam the milk - normally you hold the jug at the right spot and open the steam valve with the other hand (solution: go for a machine with a ball-jointed steam wand that will allow the wand to be immersed while the valve is opened, then pick the jug up to do the milk, then put it back down to close the valve).
I reckon with those you should be set. You should have a look at the Information about Machines thread in the Brewing Equipment (non-machine specific) area and see if theres anything in your budget (which is....?). While you dont need a heat exchanger machine per se, theyll be heavier than single boiler machines and its probably the weight that will help you out.