Hajj & Umrah

Delaying hajj due to a concern that one's income may not be completely halaal

Q: Is it permissible for a person who is accredited for Hajj, and has both the means and opportunity to fulfill their Fardh Hajj, to delay it as he is concerned that their income may not be completely halaal? The individual intends to fulfill the obligation but wishes to ensure that they use only pure, halaal money for this sacred journey.

Removing the hair after doing a second umrah

Q: If a person has shaved his hair after doing first Umrah and he does another Umrah after one or two days, he doesn't have any hair or the hair is little, it has been mentioned in kitaab that he should use a blunt razor blade on top the head to come out of Ihram. 

My question is that if a person can't find a blunt razor blade will it be permissible to use a hair trimmer on top of the head to come out of Ihram?

Performing tawaaf with long intervals in between the rounds

Q: Is it permissible to separate tawaf rounds due to pain? 

Example, I did a few rounds of tawaf one day and a few another day until the seven rounds of tawaf have been completed? 

In the above mentioned situation, if a person is unable to do complete seven rounds of tawaf walking in one go due to pain but can do it separately like the above mentioned situation, will it be permissible for him to do complete seven rounds of tawaf in a wheelchair?