help with our boiler disaster

This really nice guy came to visit from Advance Heating. Decided to plug the name since have never had a salesman before who didnt try to sell us anything but actually helped us to move forward. And we havent spent anything yet! All he did was advise us. He says first we need to insulate all outside walls with Trisol 13 and need 2 layers. Lower our ceilings in the bedrooms slightly so we no longer have "caravan" curves since these cause more heat loss. Also insulate under floorboards in lounge. Then invest in stainless steel hot water tank - can add solar panels at later date if we ever afford to. He reckons if we do this soon we will cut our heat loss by around 50% and probably find it much easier to heat the house using current woodburner. That sorts us out for hot water and warmer home for very little and we only need help installing hot water tank. He said we can do most of what is needed ourselves. He is also making us calculate the BTU for every room. He said he could do it for us but charges £240 and we should use that as our incentive to get round to doing it. There are programs you can use online. I have done it for the upstairs so far and just need to do the downstairs now. He reckons we need to replace all radiators but can do this ourselves. I agree they are very old and probably inefficient. Also all are the same so not right sizes for rooms. Nice guy tho. Most people would have tried to blag us for them to do it for us. He gave us lots of leaflets on wood burning stoves and stuff with costs even tho he knows we wont have the cash for this till next january at earliest so he is not really getting anything out of this. He spent 2 hours with us and I feel dead guilty since forgot to offer him a cup of tea even. Very rude of me and he was a really nice guy. Well thats who we will be going with when we do save the money for a new boiler!