Conditions & Fundamentals of Hajj and Umrah

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?

Performing tawaaf ziyaarat in normal clothes

Q: I made Hajj and on the 10th I did the rami and then shaved my hair and took off my ihraam towels and used itr etc. After that I did my Tawaaf ziyaarat and then did saee. The Tawaaf ziyaarat and saee I did in normal clothes because I had taken off my ihraam. Now someone says that it is not permissible to do saee without Ihraam towels. Is this correct?

Is it permissible to do Tawaaf ziyaarat and saee without Ihraam towels? I did ifrad Hajj and did the same after Tawaaf ziyaarat.