I agree with you, prefabricated units from the market are of poor quality, and self-build is much better, but self-building needs the following:

1- Ready land for construction.

2- The construction is not through a land and loan product from the bank, meaning a mortgage in which you buy land and build from it.

3- Ensure that the amount of money you have is enough to build the land 100% so that you don't have a construction default, which is a big issue.

5- If you default, you must have a source of liquidity to complete the construction. <If you default, the bank mortgages the land and your salary, which means it is deducted on the installment while you are not living in the house, and if you default, the land will be sold at auction, and if you live in a rental, you pay rent and pay an installment. <But buying a ready-made unit is secured by the financing amount, then you buy the house and live.

With best regards

@mnfr10