The ruling on one who did not combine 'Umrah with Hajj

Is one considered a mutamatti' if he performed 'Umrah during the months of Hajj, intending that if Hajj became feasible for him, he would perform it, but he was not certain of this, and then Hajj became feasible and he performed it?
He is not considered a mutamatti'; because he did not combine 'Umrah with Hajj, as he did not have the intention of Hajj. However, if it is more likely in his opinion that he will be able to perform Hajj, he should exercise caution and slaughter the hady for tamattu'.