shop booking management system erd

Question

I am confused creating erd of booking management system in database there are some tables:

• shop table
• project table
• client table

and some others

project contains shops like one project contains 100 shops and other project contains 200

now client comes and books a shop with 10% of total amount of shop like there is a shop called G-11cost 8 million 10% of shop is 800k

client pays 800k as per policy. installment of shops starts the other cost of shop divided in 24 month

client pays 6 installments in 6 months and want to sell its shop. shop is transferred into another client who purchased this shop and then installments continue. how will I manage installment of shops and booking of shop?

keep in mind

1. booking amount should not be exactly 10%
2. 1 shop can transferred to other clients many times
3. shop can also be purchased with partnership like 1 shop have two clients

I am confused in table relation of installment, booking and how I manage partnership shops