We have asbestos siding on our house. The stuff is darn near indestructible. Not sure if this applies, but where we live (Wisconsin USA) anyone we pay to replace the siding has to have a special asbestos - handling license, and tent the whole house during the project - extremely expensive. However, as homeowners we can rip all of the siding off ourself with no extra permits, tenting etc. Not sure about your handiness level, but if your laws are similar it might pay to do the demo yourself (with a proper mask of course).
In your situation, I'd seriously consider leaving the roof be. If it's anything like our siding (which also dates from the 60's), it won't deteriorate much barring a disaster (which hopefully insurance will cover). Especially given your fluid long-term plans, it seems silly to sink so much money into something that has a good chance of lasting a while yet and won't pay for itself if you sell.