• LTCG Tax Exemption on Joint Development Projects

Our family land of around 1 acre has been given for JV to builder in 2019 with a 45:55 ratio. Of the 100 flats, 45 flats to land owner and 55 flats to developer . We had the land from over 30 years. We are expecting the Completion certificate of the project around July/August 2022. In the JDA in 2019, the developer clearly allocated flats to the 4 family members. 10 flats each to 2 Adult sons and mother and 15 flats to the senior Father. We have not yet started sale of our flats and intend to start sales after receiving Completion certificate after August 2022. 

I have few questions:
1) How could we as a family save as much as possible on capital gains.
2) Would Sec 54 or Sec 54 F apply for our above case for considering tax exemption if we are reinvesting in property. Kindly explain.
3) Can each member invest in more than one house property.
4) if the capital gain for each family member is more than Rs 2 Crores , can capital gains or upto Rs 2 Crores only be claimed for exemption if invested in house property or can we invest and exempt beyond 2 crores too for exemption. Should capital gains only be invested or full sale consideration value. 
5) would the option of once in a lifetime invest in 2 properties be applied to us 
6) Sec 54 EC , investing in special stocks of Rs 50 lakhs would exempt Rs 50 Lakhs of capital gain or proportional to full sale consideration accordingly.
7) Do you suggest we create a HUF to claim more exemption. We can create 2 HUF in family.
8) Any other strategies to get Max tax exemption
9) Any other suggestions.

Thank you
Sampat