One builder, a dozen sites
Redevelopment means the same builder buys from you for years across many different projects, which is an unusual pattern for a supplier. What you need is not one ledger per builder but one ledger readable site by site, so a question about which tower a load went to is answered from the record rather than from memory. Recording the destination on every delivery is what makes that possible.
Billing where the material is handed over
The person waiting for your bill is standing at a site rather than at your counter, and he wants the invoice on WhatsApp before the truck leaves. A supervisor with a limited login raises it there at the rate agreed for that party, and it lands in your account immediately — removing a round trip that in this belt costs half a day.
Freight varies more than the rate
Transport across Thane, Ghodbunder and out towards Kalyan changes with the destination, the time of day and whether the site is actually reachable. Folding it into the material rate makes your price look higher than it is and hides whether you are recovering it. On its own line the customer sees the split and you get a monthly figure for both.
Credit that follows a project
A builder settles when his own funding arrives, which means your money is two steps from the site. Ageing rather than a total tells you where you stand, and a credit limit set per party keeps the exposure to any one project inside what you can carry through a slow quarter.
Setting up in half an hour
Setup is a phone call and screen share: shop details and GSTIN, main items with the right units, parties with opening balances, and your bill format. Most Thane suppliers add staff logins in the first week so several people can bill from several places without the owner in the middle of every transaction.