The CTC Wings scheme is very specialised as I am sure you are aware - CTC offer that much security and piece of mind (or so to speak anyway!!) to lenders that they have arranged for HSBC to give you up to £75k unsecured on top of mortgage commitments/ student loan commitments if you have any (although I should add that this is case dependent from HSBC's stand point). To take out such a loan without any significant assets or legal guarantor, a form of secutiry is required and that is where Paul Jones come in - the predominant cover HSBC are interested in is the Loss of life and Loss of Class 1 medical as these immediately bar you from a career as a pilot. They know CTC intimately and have decided that they will be profitable from insuring people on the scheme. Other insurance companies tend to be reluctant to insure against the £75k when they do not understand the scheme or for that matter the nature of new pilots entering the industry. There are a few aviation specialist insurers that may agree too insure you but I highly doubt you would get any cheaper offer - if you have loads of time until you get out here (like CP57), search around because Paul Jones is still fairly steep, and from my understanding, you need to be insured for 2 years to cover until your line training is complete and you then fall into the airline's benefits contract. This means forking out twice for the £800 odd.
Cover for loss of life and loss of medical are the key ones HSBC are intersted in, but for yourself, you would be very wise to get some medical and repatriation cover as you will not get cover ont the state out here - one of my coursemates required a minor op just after arriving costing about £2000 and PJ paid up very efficiently to cover the full amount as I understand. Being so far from home, it can pay to have the peace of mind. As for possessions insurance, this is your call. I have it as losing all my stuff would severely bankrupt me!! The latter two you can shop around for but normal travel insurance will I doubt cover it as you are out of the country for so long.
As for being 30 years old, you are by no means unique there and to my knowledge it has no effect on your premium. Hope that helps.