I'd have to agree with Ronn's assessment...
For my experience (11,000 miles in 2.5 years in a mostly unrestored 1928 Special Coupe), it was certainly my most "fun" auto... no question, but it was also "tired-iron"... it needed a new radiator, new tires (got some ancient Garfields from a club member who bought new rubber), timing cam gear, really needs new brakes and drums, front and rear axle re-builds, etc.
It's been mothballed for a couple years now , waiting for an engine re-build.
While you can still get "anything you need" to keep an A on the road, the parts are not necessarily cheap (how about $80 or so for a set of re-lined brake shoes for one axle ?); tires are upwards of $100 / each, and are usually bald in 10k-15k miles, unless you have fitted your A with a good modern air-filter, the engine life will be less than it could be... an oil filter also will only help extend engine life...
It's kind of hard to justify the economics for doing running an A as an everyday driver, but I don't think there's any question in my mind that doing so has a higher fun-factor for me.
Your best bet for making it feasible would be to find an A in "factory-spec" condition, as Kevin in NJ described, and be meticulous in its maintenance. That would mean a lot of money up-front, and a fair amount of time every week taking care of the car.
That's my take on it... I've been driving ancient iron for nearly 30 years now, mostly 1940's thru '60's stuff... it's been fun, but it hasn't been trouble-free or necessarily cheap.