I’m no expert but I think you fall in to the camp of doing far more than a lot of people so don’t beat yourself up too much. I’d do the insulation first and then work out a way of generating income / energy in the least damaging way. I’ve PV installed, it is a pleasant financial payment quarterly. Maybe to counterbalance any guilt you might have go to Good for the Energy, which is 100% generated renewable but where you will pay 20% more. Your conscience should be clear at that point.