:sl:
My father even clearly mentions many times that I didn't pay those fees out of love, it is an investment and I want every penny back.
I'm sure your father loves you both and what he meant was that he didn't spend all that money merely out of affection but to raise two capable sons who will look after them in their old age like they looked after you and your brother when you were little.
Even millionaire fathers expect their sons to work. Your father does has the right to take from your earnings because:
The Prophet (peace and blessings of Allaah be upon him) said: “You and your wealth belong to your father” (reported by the five and classed as saheeh by al-Tirmidhi) and “The best of what you consume is what you earn, and your children are part of your earnings” (reported by al-Tirmidhi, al-Nisaa'i and Ibn Maajah from ‘Aa’ishah). There are conditions however. Please see
here
Be kind to your parents and offer them the reassurance that you have no intention of leaving them to fend for themselves (even if you move out). And explain that once you start your business, things will improve insha Allah. Use your wife's pregnancy as a reminder of your own arrival in the world and how your parents cared for you.
The Qur'an says, Thy Lord hath decreed that you worship none but Him and that you be kind to parents. If one or both of them attain old age with thee, do not say a word of annoyance (Literally, "Do not say Uff! (an expression of annoyance) to them." (Trans.)) to them nor repulse them, but speak to them in gracious words and in mercy lower to them the wing of humility and say, My Lord, bestow Thy mercy on them, as they cherished me when I was little....(17:23-24)
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And We have enjoined on man kindness to his parents. His mother carries him in pain and she gives birth to him in pain, and (the period) of carrying him and weaning him is thirty months....(46:15)
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Once a man came to the Prophet (peace be on him) and asked, 'Who is most deserving of my good companionship?' 'Your mother,' replied the Prophet (peace be on him). 'Who next?' the man asked. 'Your mother,' replied the Prophet (peace be on him). 'Who next?' he asked. 'Your mother,' replied the Prophet (peace be on him). 'Who next?' asked the man. 'Your father,' replied the Prophet.(Reported by al-Bukhari and Muslim.)
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The Prophet (peace be on him) declared disobedience to parents to be a major sin, second only to ascribing partners to Allah, as has been stated in the Qur'an. Al-Bukhari and Muslim report his saying,
'Shall I not inform you about the three major sins?' Those who were present replied, 'Yes, O Messenger of Allah.' He said 'Associating partners with Allah and disobedience to parents,' and sitting up from the reclining position, he continued, 'and telling lies and false testimony; beware of it.'
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He also said,
"Three persons shall not enter the Garden: the one who is disobedient to his parents, the pimp, and the woman who imitates men.'' (Reported by al-Nisai, al-Bazzar on the authority of excellent transmitters, and al-Hakim) and,
"Allah defers (the punishment of) all sins to the Day of Resurrection excepting disobedience to parents, for which Allah punishes the sinner in this life before his death."(Reported by al-Hakim, on the authority of sound transmitters.)
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:wa: