Julian, where do you find these cars? It's almost as if you were a gluten for punishment. That car has more problems than you need. Just peering inside the door one can see rust abounds. Stop looking at basket-case TR6s, they will cost you way more than a driver that has been already fixed up and might need additional restoring later.
I have a friend that totally restored a 67 TR4, but he started with a basket case car, figuring that he would save money. He overlooked a solid running TR4 because the cost was about 2K higher. After hundreds of hours of welding, beating, replacing, stretching and generally killing himself, he has a super-nice restored TR4 that he could have had for a lot less had he bought the more expensive car. He realized his folly afterward.
I realize every story is different and people have different priorities and different budgets, but the old adage still is valid, buy the best you can afford. Just stay away from cars that have weird body repairs. Engines are cheap in comparison.