It depends what you mean by out of reach, two doors are already silly money for the poverty spec models. 4 doors are also 3k plus for cars that don't require lots of welding.

Duratec conversions are worthwhile as are zetecs but I'd stay away from IRS, too much hassle with not enough in return, you would be better off 4 linking aka group 4 spec.

If its just for fun, keep it simple, keep it crossflow