1. Don't train in the UK.
2. Don't go integrated.
3. Don't train for a UK/EASA licence in the US.
That will cut your costs in half straight away. Going to the US is a great idea, but get an FAA certificate - you can convert to UK/EASA in a few flights at a later date.
Personally if I was going to do it all again and spend 2-3 years in the US as a flight instructor I would make the most of every exemption and add-on available to me under part 61.129. For example it's cheaper to learn to fly Airplanes and helicopters than it is to learn to fly just helicopters.