As regards your share in the joint family property under s. 30 of Hindu Succession Act you will be entitled to make a Will of your share in the joint family property

1) you can register the will .

2) registration is optional

3) enclose medical certificate of doctor to the will .

4) one of main grounds of challenge of will is that testator is not of sound mind . . doctor certificate would help in proving that you were of sound mind

5) alimony is at discretion of court depends upon your income , whether wife is working or not , standard of living etc

6) if your income increases by transfer of shop in your name alimony amount would increase

7) your father can bequeath shop to you by will

The concept of Joint Family under Hindu law as well as the HUF in Income Tax Act, 1961 is broadly the same. HUF is purely a creature of law and cannot be created by an act of parties (except in case of adoption and reunion). A HUF is a fluctuating body, its size increases with birth of a member in the family and decreases on death of a member of the family. Females go and come into HUF on marriage. Family always signifies a group. Plurality of persons is an essential attribute of a family. Husband and wife can constitute HUF if property is received on partition. An individual who receives ancestral property at a partition and who subsequently acquires family, but has no male issue, would hold that property only as the property of the family. Under the Hindu law the wife of the coparcener is certainly a member of the family.

n cases where the property held by the person who claims it to be his own, had in fact been held by a joint family earlier and is ipso facto capable of being held by other sharers as well in future if and when the family comes into existence and a son, whether by birth or adoption, is added thereto, such property continues to retain the character of joint family property, even when the family is reduced to a single male member as in the case of a sole surviving coparcener. Thus if a coparcenary interest exists in the property left behind by you then there is no question of bequeathing it by a will. The fact is that you cannot bequeath the properties of HUF by a will even as a kart, you can do so in respect of your properties alone. If there is an event that nobody from your family survives as imagined by you, then the properties shall devolve on the other class II legal heirs automatically as per law. Hope this make you clear about the concept of HUF property.

As far as alimony payment is concerned there are various aspect to be considered.

She should not be employed

you should have sufficient income to provide her the alimony

She should prove your income or sources of income in the maintenance petition

If you are able to satisfy the court that your total income is only 15K then you may ordered to pay 1/3rd of it as monthly maintenance amount upon other conditions being satisfied..

1. It has long been, settled that the managing member of a joint Hindu family has power to alienate for value, joint family property either for family necessity or for the benefit of the estate so as to bind the interests of all the undivided members of the family whether they are adults or minors or widows.

2. When the testator can sign the will, his thumb impression creates a veil of suspicion instead of acting as a repellant of suspicious circumstances. Do opt for registration of will.

3. Your financial liability would be decided keeping in mind factors such as your income from all sources, wife's qualification and employment status and the lifestyle enjoyed by her pursuant to marriage. It could be 1/3rd of your income. The income and net worth of your parents is immaterial as parents-in-law are not liable to maintain their daughter-in-law.