Wudhu and ghusal for a person who has severe scalp acne

Q: I am a woman who has severe acne on her scalp. This has been causing me extreme distress, especially with regards to purity and showering. The pimples on my head are infectious and filled with pus. They pop all the time and when they pop they release pus/blood/liquid for usually two-three days (this is called "weeping", common for acne pimples). It is almost impossible to catch a time when there are no "weeping" pimples on my head. The only time I get to wash/shampoo my hair is when it is fardh for me to make ghusl (usually once/twice a month). I am afraid to wash my head otherwise because that would only spread the impurity coming out of the pimples all over my body. However, it is becoming extremely difficult not to wash my hair.

My hair is long and my scalp becomes very oily quickly and it makes me feel disgusted. Not washing it often seems to be worsening my acne, as well as making my head itch like crazy (and itching it just pops more pimples). There doesn't seem to be any effective medical solution for scalp acne, I've tried a couple things but none of them worked. This situation is really stressing me out. Can I just shower whenever I want to even if the pimples on my head are releasing impurity? What do I do about the impurity going all over the rest of my body?

Exerting oneself in ibaadat

Q: I have a question about the Sahabi who only did the bare minimum and didn't do too many optional acts. When another Sahabi stayed at his house for 3 days he didn't notice anything special that he was doing. Despite this, Rasulullah (sallallahu alaihi wasallam) said he was a jannati. Other Sahaba always followed the azeemat and took the more difficult path. So, as a general rule, should I take the easy path or the hard path when I have to make a decision?

Income of an accountant who does tax evasion

Q: I am an accountant and maintain double vouchers/books of accounts from the actual books for the purpose of reducing the taxes on sale income and also to increase the expenditure from the actual expenses to show that the company has less profit. I make double vouchers and books for tax purposes ordered by the company's owner. My question is, is my profession jaiz or not? Is the salary which I receive are halal or haram?

Authenticity of a Hadith on rainwater treatment

Q: I just want to verify the authenticity of a hadith on rainwater treatment:

Nabi (sallallahu alaihi wasallam) said that Jibareel (alaihis salaam) taught me a remedy that obviates the need for any medicine or physician.

Recite 70 times on rain water, Surah Faatiha, Surah Ikhlaas, Surah Falaq & Surah Naas.

Drink for seven days, morning and evening. Whoever drinks it Allah will eliminate all sicknesses and pain. Whoever gives it to a woman before sleeping with her, she will, by the permission of Allah, fall pregnant. It cures the eyes, eliminates sihr, toothache, urine stoppage, etc.