The crop sets the calendar
Building across the district is funded by agricultural income, so demand concentrates in the weeks after the crop is sold rather than spreading through the year. The pre-season order is made once and cannot be corrected mid-season, which makes last year's movement over the same weeks the only honest basis for it.
Village deliveries and the record
Loads leave for villages across the district on hired vehicles to buyers who come to town occasionally. Vehicle, date, destination and receiver on the challan, held against the party permanently, is the only evidence the load arrived — and it is resendable on WhatsApp when a question comes months later.
Credit until the harvest
Farm-linked credit runs to the crop rather than to a date, so the whole catchment settles in the same few weeks and your exposure peaks predictably. Knowing the total and its ageing before that period is what tells you how much more you can safely give during it.
Food processing units alongside
The district's processing industry brings buyers on formal terms who want a referenced invoice and a delivery record that reconciles against their store. The same shop serves them and the village house builder, which is exactly why one system rather than a bill book and a register matters.